diff --git a/Important-tips.md b/Important-tips.md
index 1215ee9..bcae4d5 100644
--- a/Important-tips.md
+++ b/Important-tips.md
@@ -9,6 +9,9 @@
 * PDF support is symbolic. KCC can only extract JPG images from them.
 * ComicRack metadata will be parsed only if they are saved in *ComicInfo.xml* file.
 
+### Metadata:
+* Build-in editor should be used only with archives **not** created by KCC. Workflow: Files -> KCC -> CBZ -> KCC -> MOBI will **not** produce valid output.
+
 ### Calibre:
 * Calibre can be used to upload files created by KCC.
 * **Don't convert files created by KCC with Calibre!** Any conversion process will corrupt the file!