diff --git a/Known-issues.md b/Known-issues.md
index 991ed50..844d884 100644
--- a/Known-issues.md
+++ b/Known-issues.md
@@ -1,3 +1,4 @@
 * **[All]** _Add directory_ button don't support multiselection. QT limitation.
+* **[All]** PNG files using RBGA palette crash conversion. Pillow 2.4.0 bug. 
 * **[Linux]** On GTK-based desktop environments clicking _Add directory_ or _Add file_ button might display additional black window. QT bug.
 * **[Linux]** Lack of tray icon. Disabled intentionally due to multiple QT bugs.
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