Index: /CKEditor/trunk/_source/plugins/list/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/list/plugin.js	(revision 7564)
+++ /CKEditor/trunk/_source/plugins/list/plugin.js	(revision 7565)
@@ -701,5 +701,6 @@
 		{
 			var sibling = listNode[ rtl ? 'getPrevious' : 'getNext' ]( nonEmpty );
-			if ( sibling && sibling.is( listNode.getName() ) )
+			if ( sibling && sibling.type == CKEDITOR.NODE_ELEMENT &&
+			     sibling.is( listNode.getName() ) )
 			{
 				// Move children order by merge direction.(#3820)