Index: /FCKeditor/trunk/editor/_source/commandclasses/fckshowblocks.js
===================================================================
--- /FCKeditor/trunk/editor/_source/commandclasses/fckshowblocks.js	(revision 722)
+++ /FCKeditor/trunk/editor/_source/commandclasses/fckshowblocks.js	(revision 723)
@@ -36,5 +36,5 @@
 
 	if ( state == FCK_TRISTATE_DISABLED )
-		return false ;
+		return ;
 
 	var body = FCK.EditorDocument.body ;
Index: /FCKeditor/trunk/editor/_source/internals/fckdomtools.js
===================================================================
--- /FCKeditor/trunk/editor/_source/internals/fckdomtools.js	(revision 722)
+++ /FCKeditor/trunk/editor/_source/internals/fckdomtools.js	(revision 723)
@@ -302,5 +302,5 @@
 		if ( doc.body.lastChild && ( doc.body.lastChild.nodeType != 1 
 				|| doc.body.lastChild.tagName.toLowerCase() == tagName.toLowerCase() ) )
-			return null ;
+			return ;
 		var node = doc.createElement( tagName ) ;
 		if ( FCKBrowserInfo.IsGecko && FCKListsLib.NonEmptyBlockElements[ tagName ] )