Index: /FCKeditor/trunk/editor/_source/classes/fckeditingarea.js
===================================================================
--- /FCKeditor/trunk/editor/_source/classes/fckeditingarea.js	(revision 204)
+++ /FCKeditor/trunk/editor/_source/classes/fckeditingarea.js	(revision 205)
@@ -216,4 +216,6 @@
 		if ( this.Mode == FCK_EDITMODE_WYSIWYG )
 		{
+			// The following check is important to avoid IE entering in a focus loop. Ref:
+			// http://sourceforge.net/tracker/index.php?func=detail&aid=1567060&group_id=75348&atid=543653
 			if ( FCKBrowserInfo.IsIE && this.Document.hasFocus() )
 				return ;
Index: /FCKeditor/trunk/editor/_source/internals/fck.js
===================================================================
--- /FCKeditor/trunk/editor/_source/internals/fck.js	(revision 204)
+++ /FCKeditor/trunk/editor/_source/internals/fck.js	(revision 205)
@@ -647,4 +647,10 @@
 	if ( FCK._ForceResetIsDirty )
 		FCK.ResetIsDirty() ;
+	
+	// This is a tricky thing for IE. In some cases, even if the cursor is
+	// blinking in the editing, the keystroke handler doesn't catch keyboard
+	// events. We must activate the editing area to make it work. (#142).
+	if ( FCKBrowserInfo.IsIE && FCK.HasFocus )
+		FCK.EditorDocument.body.setActive() ;
 
 	FCK.OnAfterSetHTML() ;