diff --git a/classes/feeds.php b/classes/feeds.php
index 98ea55c0b..5ecac494a 100644
--- a/classes/feeds.php
+++ b/classes/feeds.php
@@ -715,12 +715,10 @@ class Feeds extends Protected_Handler {
 						onclick=\"editArticleNote($id)\"
 						alt='PubNote' title='".__('Edit article note')."'>";
 
-					if (DIGEST_ENABLE) {
-						$reply['content'] .= "<img src=\"".theme_image($this->link, 'images/art-email.png')."\"
-							style=\"cursor : pointer\"
-							onclick=\"emailArticle($id)\"
-							alt='Zoom' title='".__('Forward by email')."'>";
-					}
+					$reply['content'] .= "<img src=\"".theme_image($this->link, 'images/art-email.png')."\"
+						style=\"cursor : pointer\"
+						onclick=\"emailArticle($id)\"
+						alt='Zoom' title='".__('Forward by email')."'>";
 
 					if (ENABLE_TWEET_BUTTON) {
 						$reply['content'] .= "<img src=\"".theme_image($this->link, 'images/art-tweet.png')."\"
diff --git a/classes/pref_users.php b/classes/pref_users.php
index 63e1fd22c..b9d162fd2 100644
--- a/classes/pref_users.php
+++ b/classes/pref_users.php
@@ -308,16 +308,16 @@ class Pref_Users extends Protected_Handler {
 
 				$mail->CharSet = "UTF-8";
 
-				$mail->From = DIGEST_FROM_ADDRESS;
-				$mail->FromName = DIGEST_FROM_NAME;
+				$mail->From = SMTP_FROM_ADDRESS;
+				$mail->FromName = SMTP_FROM_NAME;
 				$mail->AddAddress($email, $login);
 
-				if (DIGEST_SMTP_HOST) {
-					$mail->Host = DIGEST_SMTP_HOST;
+				if (SMTP_HOST) {
+					$mail->Host = SMTP_HOST;
 					$mail->Mailer = "smtp";
-					$mail->SMTPAuth = DIGEST_SMTP_LOGIN != '';
-					$mail->Username = DIGEST_SMTP_LOGIN;
-					$mail->Password = DIGEST_SMTP_PASSWORD;
+					$mail->SMTPAuth = SMTP_LOGIN != '';
+					$mail->Username = SMTP_LOGIN;
+					$mail->Password = SMTP_PASSWORD;
 				}
 
 				$mail->IsHTML(false);
diff --git a/classes/rpc.php b/classes/rpc.php
index c553b9b90..272c25ef4 100644
--- a/classes/rpc.php
+++ b/classes/rpc.php
@@ -570,7 +570,7 @@ class RPC extends Protected_Handler {
 
 		$reply = array();
 
-		if (DIGEST_ENABLE && $_SESSION['email_secretkey'] &&
+		if ($_SESSION['email_secretkey'] &&
 		$secretkey == $_SESSION['email_secretkey']) {
 
 			$_SESSION['email_secretkey'] = '';
@@ -593,12 +593,12 @@ class RPC extends Protected_Handler {
 			$mail->FromName = $fromname;
 			$mail->AddAddress($destination);
 
-			if (DIGEST_SMTP_HOST) {
-				$mail->Host = DIGEST_SMTP_HOST;
+			if (SMTP_HOST) {
+				$mail->Host = SMTP_HOST;
 				$mail->Mailer = "smtp";
-				$mail->SMTPAuth = DIGEST_SMTP_LOGIN != '';
-				$mail->Username = DIGEST_SMTP_LOGIN;
-				$mail->Password = DIGEST_SMTP_PASSWORD;
+				$mail->SMTPAuth = SMTP_LOGIN != '';
+				$mail->Username = SMTP_LOGIN;
+				$mail->Password = SMTP_PASSWORD;
 			}
 
 			$mail->IsHTML(false);
diff --git a/config.php-dist b/config.php-dist
index 4e231a6f0..e4b5ae32d 100644
--- a/config.php-dist
+++ b/config.php-dist
@@ -1,5 +1,8 @@
 <?php
-	// Database server configuration
+	// *******************************************
+	// *** Database configuration (important!) ***
+	// *******************************************
+
 	define('DB_TYPE', "pgsql"); // or mysql
 	define('DB_HOST', "localhost");
 	define('DB_USER', "fox");
@@ -7,24 +10,40 @@
 	define('DB_PASS', "XXXXXX");
 	//define('DB_PORT', '5432'); // when neeeded, PG-only
 
+	define('MYSQL_CHARSET', 'UTF8');
+	// Connection charset for MySQL. If you have a legacy database and/or experience
+	// garbage unicode characters with this option, try setting it to a blank string.
+
+	// ***********************************
+	// *** Basic settings (important!) ***
+	// ***********************************
+
 	define('SELF_URL_PATH', 'http://yourserver/tt-rss/');
 	// Full URL of your tt-rss installation. This should be set to the
 	// location of tt-rss directory, e.g. http://yourserver/tt-rss/
 	// You need to set this option correctly otherwise several features
 	// including PUSH, bookmarklets and browser integration will not work properly.
 
-	define('SINGLE_USER_MODE', true);
+	define('SINGLE_USER_MODE', false);
 	// Operate in single user mode, disables all functionality related to
 	// multiple users.
-	
+
+	// *****************************
+	// *** Files and directories ***
+	// *****************************
+
+	define('PHP_EXECUTABLE', '/usr/bin/php');
+	// Path to PHP executable, used for various command-line tt-rss programs
+
+	define('LOCK_DIRECTORY', 'lock');
+	// Directory for lockfiles, must be writable to the user you run
+	// daemon process or cronjobs under.
+
 	define('CACHE_DIR', 'cache');
 	// Local cache directory for RSS feed content.
 
-	define('SIMPLEPIE_CACHE_IMAGES', false);
-	// Allow caching feed images when using SimplePie, to bypass hotlink
-	// prevention and such at expense of local disk space and bandwidth.
-	// Note that you (or your users) also have to enable image caching 
-	// in feed editor.
+	define('TMP_DIRECTORY', '/tmp');
+	// Directory for temporary files
 
 	define('ICONS_DIR', "feed-icons");
 	define('ICONS_URL', "feed-icons");
@@ -32,82 +51,51 @@
 	// Unless you really know what you're doing, please keep those relative
 	// to tt-rss main directory.
 
-	define('TMP_DIRECTORY', '/tmp');
-	// Directory for temporary files
+	// *********************
+	// *** Feed settings ***
+	// *********************
 
-	define('DAEMON_SLEEP_INTERVAL', 120);
-	// Interval between update daemon update runs
-
-	define('DATABASE_BACKED_SESSIONS', false);
-	// Store session information in a database, recommended for multiuser 
-	// configurations. Doesn't seem to work for everyone, so enable with caution.
-	// tt-rss uses default PHP session storing mechanism if disabled.
-
-	define('SESSION_CHECK_ADDRESS', 1);
-	// Check client IP address when validating session:
-	// 0 - disable checking
-	// 1 - check first 3 octets of an address (recommended)
-	// 2 - check first 2 octets of an address
-	// 3 - check entire address
-
-	define('SESSION_COOKIE_LIFETIME', 0);
-	// Default lifetime of a session (e.g. login) cookie. In seconds, 
-	// 0 means cookie will be deleted when browser closes.
-
-	define('SESSION_EXPIRE_TIME', 86400);
-	// Hard expiration limit for sessions. Should be
-	// greater or equal to SESSION_COOKIE_LIFETIME
-
-	define('DAEMON_UPDATE_LOGIN_LIMIT', 0);
-	// Stop updating feeds of user who haven't logged in specified 
-	// amount of days. 0 disables.
-
-	define('CHECK_FOR_NEW_VERSION', true);
-	// Check for new versions of tt-rss automatically.
-
-	define('DIGEST_ENABLE', true);
-	// Global option to enable daily digests. Also toggles the ability of users
-	// to forward articles by email.
-
-	define('DIGEST_EMAIL_LIMIT', 10);
-	// The maximum amount of emails sent in one digest batch
-
-	define('DAEMON_SENDS_DIGESTS', true);
-	// If update daemon and update_feeds should send digests
-	// Disable if you prefer querying special URL (see wiki)
-
-	define('MYSQL_CHARSET', 'UTF8');
-	// Connection charset for MySQL. If you have a legacy database and/or experience
-	// garbage unicode characters with this option, try setting it to a blank string.
+	define('SIMPLEPIE_CACHE_IMAGES', false);
+	// Allow caching feed images when using SimplePie, to bypass hotlink
+	// prevention and such at expense of local disk space and bandwidth.
+	// Note that you (or your users) also have to enable image caching 
+	// in feed editor.
 
 	define('DEFAULT_UPDATE_METHOD', 0);
 	// Which feed parsing library to use as default:
 	// 0 - Magpie
 	// 1 - SimplePie
 
-	define('COUNTERS_MAX_AGE', 365);
-	// Hard limit for unread counters calculation. Try tweaking this
-	// parameter to speed up tt-rss when having a huge number of articles
-	// in the database (better yet, enable purging!)
+	define('FORCE_ARTICLE_PURGE', 0);
+	// When this option is not 0, users ability to control feed purging
+	// intervals is disabled and all articles (which are not starred) 
+	// older than this amount of days are purged.
 
-	define('DIGEST_FROM_NAME', 'Tiny Tiny RSS');
-	define('DIGEST_FROM_ADDRESS', 'noreply@your.domain.dom');
-	// Name, address and subject for sending outgoing mail. This applies
-	// to password reset notifications, digest emails and any other mail.
+	// *** PubSubHubbub settings ***
 
-	define('DIGEST_SUBJECT', '[tt-rss] New headlines for last 24 hours');
-	// Subject line for email digests
+	define('PUBSUBHUBBUB_HUB', '');
+	// URL to a PubSubHubbub-compatible hub server. If defined, "Published
+	// articles" generated feed would automatically become PUSH-enabled.
 
-	define('DIGEST_SMTP_HOST', '');
-	// SMTP Host to send outgoing mail. Blank - use system MTA.
+	define('PUBSUBHUBBUB_ENABLED', true);
+	// Enable client PubSubHubbub support in tt-rss. When disabled, tt-rss
+	// won't try to subscribe to PUSH feed updates.
 
-	define('DIGEST_SMTP_LOGIN', '');
-	define('DIGEST_SMTP_PASSWORD', '');
-	// These two options enable SMTP authentication when sending
-	// outgoing mail. Require DIGEST_SMTP_HOST.
+	// *********************
+	// *** Sphinx search ***
+	// *********************
 
-	define('DAEMON_FEED_LIMIT', 100);
-	// Limits the amount of feeds daemon (or a cronjob) updates on one run
+	define('SPHINX_ENABLED', false);
+	// Enable fulltext search using Sphinx (http://www.sphinxsearch.com)
+	// Please see http://tt-rss.org/wiki/SphinxSearch for more information.
+
+	define('SPHINX_INDEX', 'ttrss');
+	// Index name in Sphinx configuration. You can specify multiple indexes
+	// as a comma-separated string.
+
+	// **********************
+	// *** Authentication ***
+	// **********************
 
 	define('ALLOW_REMOTE_USER_AUTH', false);
 	// Set to 'true' if you trust your web server's REMOTE_USER 
@@ -127,16 +115,9 @@
 	// You want new users to be automaticaly created in tt-rss database
 	// on first login
 
-	define('LOCK_DIRECTORY', 'lock');
-	// Directory for lockfiles, must be writable to the user you run
-	// daemon process or cronjobs under.
-
-	define('ENABLE_GZIP_OUTPUT', false);
-	// Selectively gzip output to improve wire performance. This requires
-	// PHP Zlib extension on the server.
-
-	define('PHP_EXECUTABLE', '/usr/bin/php');
-	// Path to PHP executable
+	// ***********************************
+	// *** Self-registrations by users ***
+	// ***********************************
 
 	define('ENABLE_REGISTRATION', false);
 	// Allow users to register themselves. Please be vary that allowing
@@ -151,23 +132,49 @@
 	// Maximum amount of users which will be allowed to register on this
 	// system. 0 - no limit.
 
-	define('FEEDBACK_URL', '');
-	// Displays an URL for users to provide feedback or comments regarding
-	// this instance of tt-rss. Can lead to a forum, contact email, etc.
+	// **********************************
+	// *** Cookies and login sessions ***
+	// **********************************
+	
+	define('SESSION_COOKIE_LIFETIME', 0);
+	// Default lifetime of a session (e.g. login) cookie. In seconds, 
+	// 0 means cookie will be deleted when browser closes.
 
-	define('FORCE_ARTICLE_PURGE', 0);
-	// When this option is not 0, users ability to control feed purging
-	// intervals is disabled and all articles (which are not starred) 
-	// older than this amount of days are purged.
+	define('SESSION_EXPIRE_TIME', 86400);
+	// Hard expiration limit for sessions. Should be
+	// greater or equal to SESSION_COOKIE_LIFETIME
 
-	define('SPHINX_ENABLED', false);
-	// Enable fulltext search using Sphinx (http://www.sphinxsearch.com)
-	// Please see http://tt-rss.org/wiki/SphinxSearch for more information.
+	define('SESSION_CHECK_ADDRESS', 1);
+	// Check client IP address when validating session:
+	// 0 - disable checking
+	// 1 - check first 3 octets of an address (recommended)
+	// 2 - check first 2 octets of an address
+	// 3 - check entire address
 
-	define('SPHINX_INDEX', 'ttrss');
-	// Index name in Sphinx configuration. You can specify multiple indexes
-	// as a comma-separated string.
+	// *********************************
+	// *** Email and digest settings ***
+	// *********************************
 
+	define('SMTP_FROM_NAME', 'Tiny Tiny RSS');
+	define('SMTP_FROM_ADDRESS', 'noreply@your.domain.dom');
+	// Name, address and subject for sending outgoing mail. This applies
+	// to password reset notifications, digest emails and any other mail.
+
+	define('DIGEST_SUBJECT', '[tt-rss] New headlines for last 24 hours');
+	// Subject line for email digests
+
+	define('SMTP_HOST', '');
+	// SMTP Host to send outgoing mail. Blank - use system MTA.
+
+	define('SMTP_LOGIN', '');
+	define('SMTP_PASSWORD', '');
+	// These two options enable SMTP authentication when sending
+	// outgoing mail. Only used with SMTP_HOST
+
+	// ************************************
+	// *** Twitter integration settings ***
+	// ************************************
+	
 	define('ENABLE_TWEET_BUTTON', false);
 	// Enable 'tweet this' button for articles
 
@@ -176,19 +183,27 @@
 	// Your OAuth instance authentication information for Twitter, visit
 	// http://twitter.com/oauth_clients to register your instance.
 
-	define('PUBSUBHUBBUB_HUB', '');
-	// URL to a PubSubHubbub-compatible hub server. If defined, "Published
-	// articles" generated feed would automatically become PUSH-enabled.
+	// ***************************************
+	// *** Other settings (less important) ***
+	// ***************************************
 
-	define('PUBSUBHUBBUB_ENABLED', true);
-	// Enable client PubSubHubbub support in tt-rss. When disabled, tt-rss
-	// won't try to subscribe to PUSH feed updates.
+	define('CHECK_FOR_NEW_VERSION', true);
+	// Check for new versions of tt-rss automatically.
 
-	define('ISCONFIGURED', false);
-	// Please set this to true if you have read everything above and
-	// finished setting configuration options.
+	define('COUNTERS_MAX_AGE', 365);
+	// Hard limit for unread counters calculation. Try tweaking this
+	// parameter to speed up tt-rss when having a huge number of articles
+	// in the database (better yet, enable purging!)
 
-	define('CONFIG_VERSION', 23);
+	define('ENABLE_GZIP_OUTPUT', false);
+	// Selectively gzip output to improve wire performance. This requires
+	// PHP Zlib extension on the server.
+
+	define('FEEDBACK_URL', '');
+	// Displays an URL for users to provide feedback or comments regarding
+	// this instance of tt-rss. Can lead to a forum, contact email, etc.
+	
+	define('CONFIG_VERSION', 24);
 	// Expected config version. Please update this option in config.php
 	// if necessary (after migrating all new options from this file).
 
diff --git a/include/db.php b/include/db.php
index 1401c089b..7b2bd2a77 100644
--- a/include/db.php
+++ b/include/db.php
@@ -22,7 +22,7 @@ function db_connect($host, $user, $pass, $db) {
 		$link = pg_connect($string);
 
 		if (!$link) {
-			die("Connection failed: " . pg_last_error($link));
+			die("Unable to connect to database (as $user to $host, database $db):" . pg_last_error());
 		}
 
 		return $link;
@@ -36,7 +36,7 @@ function db_connect($host, $user, $pass, $db) {
 			}
 			return $link;
 		} else {
-			die("Connection failed: " . mysql_error($link));
+			die("Unable to connect to database (as $user to $host, database $db): " . mysql_error());
 		}
 	}
 }
diff --git a/include/functions.php b/include/functions.php
index 2118858ca..ec31a1f16 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -2639,9 +2639,7 @@
 
 		require_once 'lib/phpmailer/class.phpmailer.php';
 
-		if (!DIGEST_ENABLE) return false;
-
-		$user_limit = DIGEST_EMAIL_LIMIT;
+		$user_limit = 15; // amount of users to process (e.g. emails to send out)
 		$days = 1;
 
 		print "Sending digests, batch of max $user_limit users, days = $days, headline limit = $limit\n\n";
@@ -2677,16 +2675,16 @@
 
 					$mail->CharSet = "UTF-8";
 
-					$mail->From = DIGEST_FROM_ADDRESS;
-					$mail->FromName = DIGEST_FROM_NAME;
+					$mail->From = SMTP_FROM_ADDRESS;
+					$mail->FromName = SMTP_FROM_NAME;
 					$mail->AddAddress($line["email"], $line["login"]);
 
-					if (DIGEST_SMTP_HOST) {
-						$mail->Host = DIGEST_SMTP_HOST;
+					if (SMTP_HOST) {
+						$mail->Host = SMTP_HOST;
 						$mail->Mailer = "smtp";
-						$mail->SMTPAuth = DIGEST_SMTP_LOGIN != '';
-						$mail->Username = DIGEST_SMTP_LOGIN;
-						$mail->Password = DIGEST_SMTP_PASSWORD;
+						$mail->SMTPAuth = SMTP_LOGIN != '';
+						$mail->Username = SMTP_LOGIN;
+						$mail->Password = SMTP_PASSWORD;
 					}
 
 					$mail->IsHTML(true);
@@ -3288,12 +3286,10 @@
 						onclick=\"editArticleNote($id)\"
 						alt='PubNote' title='".__('Edit article note')."'>";
 
-				if (DIGEST_ENABLE) {
-					$rv['content'] .= "<img src=\"".theme_image($link, 'images/art-email.png')."\"
-						class='tagsPic' style=\"cursor : pointer\"
-						onclick=\"emailArticle($id)\"
-						alt='Zoom' title='".__('Forward by email')."'>";
-				}
+				$rv['content'] .= "<img src=\"".theme_image($link, 'images/art-email.png')."\"
+					class='tagsPic' style=\"cursor : pointer\"
+					onclick=\"emailArticle($id)\"
+					alt='Zoom' title='".__('Forward by email')."'>";
 
 				if (ENABLE_TWEET_BUTTON) {
 					$rv['content'] .= "<img src=\"".theme_image($link, 'images/art-tweet.png')."\"
diff --git a/include/rssfuncs.php b/include/rssfuncs.php
index 3dbcb34b2..7588428de 100644
--- a/include/rssfuncs.php
+++ b/include/rssfuncs.php
@@ -1,4 +1,8 @@
 <?php
+	define('DAEMON_UPDATE_LOGIN_LIMIT', 30);
+	define('DAEMON_FEED_LIMIT', 100);
+	define('DAEMON_SLEEP_INTERVAL', 120);
+
 	function update_feedbrowser_cache($link) {
 
 		$result = db_query($link, "SELECT feed_url, site_url, title, COUNT(id) AS subscribers
@@ -57,7 +61,7 @@
 		// Process all other feeds using last_updated and interval parameters
 
 		// Test if the user has loggued in recently. If not, it does not update its feeds.
-		if (DAEMON_UPDATE_LOGIN_LIMIT > 0) {
+		if (!SINGLE_USER_MODE && DAEMON_UPDATE_LOGIN_LIMIT > 0) {
 			if (DB_TYPE == "pgsql") {
 				$login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".DAEMON_UPDATE_LOGIN_LIMIT." days'";
 			} else {
@@ -143,7 +147,7 @@
 		}
 
 		// Send feed digests by email if needed.
-		if (DAEMON_SENDS_DIGESTS) send_headlines_digests($link);
+		send_headlines_digests($link);
 
 	} // function update_daemon_common
 
diff --git a/include/sanity_check.php b/include/sanity_check.php
index 2769b4b59..aebe4f89d 100644
--- a/include/sanity_check.php
+++ b/include/sanity_check.php
@@ -2,174 +2,134 @@
 	require_once "functions.php";
 
 	if (!file_exists("config.php")) {
-		print "<b>Fatal Error</b>: You forgot to copy
-		<b>config.php-dist</b> to <b>config.php</b> and edit it.\n";
-		exit;
-	}
+		$err_msg = "Configuration file not found. Looks like you forgot to copy config.php-dist to config.php and edit it.";
+	} else {
 
-	define('EXPECTED_CONFIG_VERSION', 23);
-	define('SCHEMA_VERSION', 86);
+		define('EXPECTED_CONFIG_VERSION', 24);
+		define('SCHEMA_VERSION', 86);
 
-	require_once "config.php";
-	require_once "sanity_config.php";
+		require_once "config.php";
+		require_once "sanity_config.php";
 
-	if (CONFIG_VERSION != EXPECTED_CONFIG_VERSION) {
-		$err_msg = "config: your config file version is incorrect. See config.php-dist.\n";
-	}
-
-	$purifier_cache_dir = CACHE_DIR . "/htmlpurifier";
-
-	if (!is_writable($purifier_cache_dir)) {
-		$err_msg = "config: HTMLPurifier cache directory should be writable by anyone (chmod -R 777 $purifier_cache_dir)";
-	}
-
-	if (GENERATED_CONFIG_CHECK != EXPECTED_CONFIG_VERSION) {
-		$err_msg = "config: your sanity_config.php is outdated, please recreate it using ./utils/regen_config_checks.sh";
-	}
-
-	foreach ($requred_defines as $d) {
-		if (!defined($d)) {
-			$err_msg = "config: required constant $d is not defined. Please check config.php";
+		if (CONFIG_VERSION != EXPECTED_CONFIG_VERSION) {
+			$err_msg = "Configuration file (config.php) has incorrect version. Update it with new options from config.php-dist and set CONFIG_VERSION to the correct value.";
 		}
-	}
 
-	if (defined('RSS_BACKEND_TYPE')) {
-		print "<b>Fatal error</b>: RSS_BACKEND_TYPE is deprecated. Please remove this
-			option from config.php\n";
-		exit;
-	}
+		$purifier_cache_dir = CACHE_DIR . "/htmlpurifier";
 
-	if (file_exists("xml-export.php") || file_exists("xml-import.php")) {
-		print "<b>Fatal Error</b>: XML Import/Export tools (<b>xml-export.php</b>
-		and <b>xml-import.php</b>) could be used maliciously. Please remove them
-		from your TT-RSS instance.\n";
-		exit;
-	}
+		if (!is_writable($purifier_cache_dir)) {
+			$err_msg = "HTMLPurifier cache directory should be writable by anyone (chmod -R 777 $purifier_cache_dir)";
+		}
 
-	if (SINGLE_USER_MODE && DAEMON_UPDATE_LOGIN_LIMIT > 0) {
-		print "<b>Fatal Error</b>: Please set DAEMON_UPDATE_LOGIN_LIMIT
-			to 0 in single user mode.\n";
-		exit;
-	}
+		if (GENERATED_CONFIG_CHECK != EXPECTED_CONFIG_VERSION) {
+			$err_msg = "Configuration option checker sanity_config.php is outdated, please recreate it using ./utils/regen_config_checks.sh";
+		}
 
-	if (!defined('SESSION_EXPIRE_TIME')) {
-		$err_msg = "config: SESSION_EXPIRE_TIME is undefined";
-	}
-
-	if (SESSION_EXPIRE_TIME < 60) {
-		$err_msg = "config: SESSION_EXPIRE_TIME is too low (less than 60)";
-	}
-
-	if (SESSION_EXPIRE_TIME < SESSION_COOKIE_LIFETIME) {
-		$err_msg = "config: SESSION_EXPIRE_TIME should be greater or equal to" .
-			"SESSION_COOKIE_LIFETIME";
-	}
-
-/*	if (defined('DISABLE_SESSIONS')) {
-		$err_msg = "config: you have enabled DISABLE_SESSIONS. Please disable this option.";
-} */
-
-	if (DATABASE_BACKED_SESSIONS && SINGLE_USER_MODE) {
-		$err_msg = "config: DATABASE_BACKED_SESSIONS is incompatible with SINGLE_USER_MODE";
-	}
-
-	if (DATABASE_BACKED_SESSIONS && DB_TYPE == "mysql") {
-		$err_msg = "config: DATABASE_BACKED_SESSIONS are currently broken with MySQL";
-	}
-
-	if (SINGLE_USER_MODE) {
-		$link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
-
-		if ($link) {
-			$result = db_query($link, "SELECT id FROM ttrss_users WHERE id = 1");
-
-			if (db_num_rows($result) != 1) {
-				$err_msg = "config: SINGLE_USER_MODE is enabled but default admin account (UID=1) is not found.";
+		foreach ($requred_defines as $d) {
+			if (!defined($d)) {
+				$err_msg = "Required configuration file parameter $d is not defined in config.php. You might need to copy it from config.php-dist.";
 			}
 		}
+
+		if (SESSION_EXPIRE_TIME < 60) {
+			$err_msg = "SESSION_EXPIRE_TIME set in config.php is too low, please set it to an integer value >= 60";
+		}
+
+		if (SESSION_EXPIRE_TIME < SESSION_COOKIE_LIFETIME) {
+			$err_msg = "SESSION_EXPIRE_TIME set in config.php should be >= to SESSION_COOKIE_LIFETIME";
+		}
+
+		if (SINGLE_USER_MODE) {
+			$link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
+
+			if ($link) {
+				$result = db_query($link, "SELECT id FROM ttrss_users WHERE id = 1");
+
+				if (db_num_rows($result) != 1) {
+					$err_msg = "SINGLE_USER_MODE is enabled in config.php but default admin account is not found.";
+				}
+			}
+		}
+
+		if (SELF_URL_PATH == "http://yourserver/tt-rss/") {
+			if ($_SERVER['HTTP_REFERER']) {
+				$err_msg = "Please set SELF_URL_PATH to the correct value for your server (possible value: <b>" . $_SERVER['HTTP_REFERER'] . "</b>)";
+			} else {
+				$err_msg = "Please set SELF_URL_PATH to the correct value for your server.";
+			}
+		}
+
+		if (!is_writable(ICONS_DIR)) {
+			$err_msg = "ICONS_DIR defined in config.php is not writable (chmod -R 777 ".ICONS_DIR.").\n";
+		}
+
+		if (ini_get("open_basedir")) {
+			$err_msg = "PHP configuration option open_basedir is not supported. Please disable this in PHP settings file (php.ini).";
+		}
+
+		if (!function_exists("curl_init") && !ini_get("allow_url_fopen")) {
+			$err_msg = "PHP configuration option allow_url_fopen is disabled, and CURL functions are not present. Either enable allow_url_fopen or install PHP extension for CURL.";
+		}
+
+		if (!function_exists("json_encode")) {
+			$err_msg = "PHP support for JSON is required, but was not found.";
+		}
+
+		if (DB_TYPE == "mysql" && !function_exists("mysql_connect")) {
+			$err_msg = "PHP support for MySQL is required for configured DB_TYPE in config.php.";
+		}
+
+		if (DB_TYPE == "pgsql" && !function_exists("pg_connect")) {
+			$err_msg = "PHP support for PostgreSQL is required for configured DB_TYPE in config.php";
+		}
+
+		if (!function_exists("mb_strlen")) {
+			$err_msg = "PHP support for mbstring functions is required, but was not found.";
+		}
+
+		if (!function_exists("ctype_lower")) {
+			$err_msg = "PHP support for ctype functions are required by HTMLPurifier.";
+		}
+
+		if (ini_get("safe_mode")) {
+			$err_msg = "PHP safe mode setting is not supported.";
+		}
+
+		if ((PUBSUBHUBBUB_HUB || PUBSUBHUBBUB_ENABLED) && !function_exists("curl_init")) {
+			$err_msg = "PHP support for CURL is required for PubSubHubbub.";
+		}
+
+		if (!class_exists("DOMDocument")) {
+			$err_msg = "PHP support for DOMDocument is required, but was not found.";
+		}
 	}
 
-	if (defined('MAIL_FROM')) {
-		$err_msg = "config: MAIL_FROM has been split into DIGEST_FROM_NAME and DIGEST_FROM_ADDRESS";
-	}
+	if ($err_msg) { ?>
+		<html>
+		<head>
+		<title>Fatal error</title>
+			<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+			<link rel="stylesheet" type="text/css" href="utility.css">
+		</head>
 
-	if (!defined('COUNTERS_MAX_AGE')) {
-		$err_msg = "config: option COUNTERS_MAX_AGE expected, but not defined";
-	}
+	<div class="floatingLogo"><img src="images/logo_wide.png"></div>
 
-	if (defined('DAEMON_REFRESH_ONLY')) {
-		$err_msg = "config: option DAEMON_REFRESH_ONLY is obsolete. Please remove this option and read about other ways to update feeds on the <a href='http://tt-rss.org/wiki/UpdatingFeeds'>wiki</a>.";
+		<h1>Fatal error</h1>
 
-	}
+		<p>Tiny Tiny RSS was unable to initialize properly. This usually means a misconfiguration or an incomplete upgrade. Please fix
+		the error indicated by the following message:</p>
 
-	if (defined('ENABLE_SIMPLEPIE')) {
-		$err_msg = "config: ENABLE_SIMPLEPIE is obsolete and replaced with DEFAULT_UPDATE_METHOD. Please adjust your config.php.";
-	}
+		<p>You might want to check tt-rss <a href="http://tt-rss.org/wiki">wiki</a> or the
+			<a href="http://tt-rss.org/forum">forums</a> for more information. Please search the forums before creating new topic
+			for your question.</p>
 
-	if (!defined('DEFAULT_UPDATE_METHOD') || (DEFAULT_UPDATE_METHOD != 0 &&
-			DEFAULT_UPDATE_METHOD != 1)) {
-		$err_msg = "config: DEFAULT_UPDATE_METHOD should be either 0 or 1.";
-	}
+		<body>
+			<?php echo format_error($err_msg) ?>
+		</body>
+		</html>
 
-	if (SELF_URL_PATH == "http://yourserver/tt-rss/") {
-		$err_msg = "config: please set SELF_URL_PATH to the correct value.";
-	}
-
-	if (!is_writable(ICONS_DIR)) {
-		$err_msg = "config: your ICONS_DIR (" . ICONS_DIR . ") is not writable.\n";
-	}
-
-	if (ini_get("open_basedir")) {
-		$err_msg = "php.ini: open_basedir is not supported.";
-	}
-
-	if (!function_exists("curl_init") && !ini_get("allow_url_fopen")) {
-		$err_msg = "php.ini: either allow_url_fopen or CURL needs to be enabled.";
-	}
-
-	if (!function_exists("json_encode")) {
-		$err_msg = "PHP: json functions not found.";
-	}
-
-	if (DB_TYPE == "mysql" && !function_exists("mysql_connect")) {
-		$err_msg = "PHP: MySQL functions not found.";
-	}
-
-	if (DB_TYPE == "pgsql" && !function_exists("pg_connect")) {
-		$err_msg = "PHP: PostgreSQL functions not found.";
-	}
-
-	if (!function_exists("mb_strlen")) {
-		$err_msg = "PHP: mbstring functions not found.";
-	}
-
-	if (!function_exists("ctype_lower")) {
-		$err_msg = "PHP: ctype functions not found (required for HTMLPurifier).";
-	}
-
-	if (ini_get("safe_mode")) {
-		$err_msg = "php.ini: Safe mode is not supported. If you wish to continue, remove this test from sanity_check.php and proceeed at your own risk. Please note that your bug reports will not be accepted or reviewed.";
-	}
-
-	if ((PUBSUBHUBBUB_HUB || PUBSUBHUBBUB_ENABLED) && !function_exists("curl_init")) {
-		$err_msg = "CURL is required for PubSubHubbub support.";
-	}
-
-	if (!class_exists("DOMDocument")) {
-		$err_msg = "PHP: DOMDocument extension not found.";
-	}
-
-	if (SELF_URL_PATH == "http://local.host/tt-rss") {
-		$err_msg = "config: please set SELF_URL_PATH to the correct value";
-	}
-
-	if (!ISCONFIGURED) {
-		$err_msg = "config: please read config.php completely.";
-	}
-
-	if ($err_msg) {
-		print "<b>Fatal Error</b>: $err_msg\n";
-		exit;
+	<?php
+		die;
 	}
 
 ?>
diff --git a/include/sanity_config.php b/include/sanity_config.php
index 51c9d52be..5ed49de51 100644
--- a/include/sanity_config.php
+++ b/include/sanity_config.php
@@ -1,3 +1,3 @@
-<?php # This file has been generated at:  Tue Apr 26 18:40:48 MSD 2011
-define('GENERATED_CONFIG_CHECK', 23);
-$requred_defines = array( 'DB_TYPE', 'DB_HOST', 'DB_USER', 'DB_NAME', 'DB_PASS', 'SELF_URL_PATH', 'SINGLE_USER_MODE', 'CACHE_DIR', 'SIMPLEPIE_CACHE_IMAGES', 'ICONS_DIR', 'ICONS_URL', 'TMP_DIRECTORY', 'DAEMON_SLEEP_INTERVAL', 'DATABASE_BACKED_SESSIONS', 'SESSION_CHECK_ADDRESS', 'SESSION_COOKIE_LIFETIME', 'SESSION_EXPIRE_TIME', 'DAEMON_UPDATE_LOGIN_LIMIT', 'CHECK_FOR_NEW_VERSION', 'DIGEST_ENABLE', 'DIGEST_EMAIL_LIMIT', 'DAEMON_SENDS_DIGESTS', 'MYSQL_CHARSET', 'DEFAULT_UPDATE_METHOD', 'COUNTERS_MAX_AGE', 'DIGEST_FROM_NAME', 'DIGEST_FROM_ADDRESS', 'DIGEST_SUBJECT', 'DIGEST_SMTP_HOST', 'DIGEST_SMTP_LOGIN', 'DIGEST_SMTP_PASSWORD', 'DAEMON_FEED_LIMIT', 'ALLOW_REMOTE_USER_AUTH', 'AUTO_LOGIN', 'AUTO_CREATE_USER', 'LOCK_DIRECTORY', 'ENABLE_GZIP_OUTPUT', 'PHP_EXECUTABLE', 'ENABLE_REGISTRATION', 'REG_NOTIFY_ADDRESS', 'REG_MAX_USERS', 'FEEDBACK_URL', 'FORCE_ARTICLE_PURGE', 'SPHINX_ENABLED', 'SPHINX_INDEX', 'ENABLE_TWEET_BUTTON', 'CONSUMER_KEY', 'CONSUMER_SECRET', 'PUBSUBHUBBUB_HUB', 'PUBSUBHUBBUB_ENABLED', 'ISCONFIGURED', 'CONFIG_VERSION'); ?>
+<?php # This file has been generated at:  Tue Dec 13 18:57:11 MSK 2011
+define('GENERATED_CONFIG_CHECK', 24);
+$requred_defines = array( 'DB_TYPE', 'DB_HOST', 'DB_USER', 'DB_NAME', 'DB_PASS', 'MYSQL_CHARSET', 'SELF_URL_PATH', 'SINGLE_USER_MODE', 'PHP_EXECUTABLE', 'LOCK_DIRECTORY', 'CACHE_DIR', 'TMP_DIRECTORY', 'ICONS_DIR', 'ICONS_URL', 'SIMPLEPIE_CACHE_IMAGES', 'DEFAULT_UPDATE_METHOD', 'FORCE_ARTICLE_PURGE', 'PUBSUBHUBBUB_HUB', 'PUBSUBHUBBUB_ENABLED', 'SPHINX_ENABLED', 'SPHINX_INDEX', 'ALLOW_REMOTE_USER_AUTH', 'AUTO_LOGIN', 'AUTO_CREATE_USER', 'ENABLE_REGISTRATION', 'REG_NOTIFY_ADDRESS', 'REG_MAX_USERS', 'SESSION_COOKIE_LIFETIME', 'SESSION_EXPIRE_TIME', 'SESSION_CHECK_ADDRESS', 'SMTP_FROM_NAME', 'SMTP_FROM_ADDRESS', 'DIGEST_SUBJECT', 'SMTP_HOST', 'SMTP_LOGIN', 'SMTP_PASSWORD', 'ENABLE_TWEET_BUTTON', 'CONSUMER_KEY', 'CONSUMER_SECRET', 'CHECK_FOR_NEW_VERSION', 'COUNTERS_MAX_AGE', 'ENABLE_GZIP_OUTPUT', 'FEEDBACK_URL', 'CONFIG_VERSION'); ?>
diff --git a/include/sessions.php b/include/sessions.php
index 8588f5807..5aeda62ff 100644
--- a/include/sessions.php
+++ b/include/sessions.php
@@ -96,7 +96,7 @@
 		db_query($session_connection, $query);
 	}
 
-	if (DATABASE_BACKED_SESSIONS) {
+	if (!SINGLE_USER_MODE && DB_TYPE == "pgsql") {
 		session_set_save_handler("ttrss_open",
 			"ttrss_close", "ttrss_read", "ttrss_write",
 			"ttrss_destroy", "ttrss_gc");
diff --git a/register.php b/register.php
index 33a6628f4..d63fc251a 100644
--- a/register.php
+++ b/register.php
@@ -311,15 +311,15 @@
 
 					$mail->CharSet = "UTF-8";
 
-					$mail->From = DIGEST_FROM_ADDRESS;
-					$mail->FromName = DIGEST_FROM_NAME;
+					$mail->From = SMTP_FROM_ADDRESS;
+					$mail->FromName = SMTP_FROM_NAME;
 					$mail->AddAddress($email);
 
-					if (DIGEST_SMTP_HOST) {
-						$mail->Host = DIGEST_SMTP_HOST;
+					if (SMTP_HOST) {
+						$mail->Host = SMTP_HOST;
 						$mail->Mailer = "smtp";
-						$mail->Username = DIGEST_SMTP_LOGIN;
-						$mail->Password = DIGEST_SMTP_PASSWORD;
+						$mail->Username = SMTP_LOGIN;
+						$mail->Password = SMTP_PASSWORD;
 					}
 
 			//		$mail->IsHTML(true);
@@ -345,15 +345,15 @@
 
 					$mail->CharSet = "UTF-8";
 
-					$mail->From = DIGEST_FROM_ADDRESS;
-					$mail->FromName = DIGEST_FROM_NAME;
+					$mail->From = SMTP_FROM_ADDRESS;
+					$mail->FromName = SMTP_FROM_NAME;
 					$mail->AddAddress(REG_NOTIFY_ADDRESS);
 
-					if (DIGEST_SMTP_HOST) {
-						$mail->Host = DIGEST_SMTP_HOST;
+					if (SMTP_HOST) {
+						$mail->Host = SMTP_HOST;
 						$mail->Mailer = "smtp";
-						$mail->Username = DIGEST_SMTP_LOGIN;
-						$mail->Password = DIGEST_SMTP_PASSWORD;
+						$mail->Username = SMTP_LOGIN;
+						$mail->Password = SMTP_PASSWORD;
 					}
 
 			//		$mail->IsHTML(true);
diff --git a/utility.css b/utility.css
index 0b80789c2..14357b4da 100644
--- a/utility.css
+++ b/utility.css
@@ -60,7 +60,6 @@ div.error {
 	padding : 5px;
 	margin : 0px 0px 5px 0px;
 	font-size : 9pt;
-	width : 50%;
 }
 
 h1 {