Index: _source/plugins/enterkey/plugin.js
===================================================================
--- _source/plugins/enterkey/plugin.js	(revision 5286)
+++ _source/plugins/enterkey/plugin.js	Thu Mar 25 16:29:55 CST 2010
@@ -26,6 +26,19 @@
 
 			var doc = range.document;
 
+			// Exit the list when we're inside an empty list item block. (#5376)
+			if ( range.checkStartOfBlock() && range.checkEndOfBlock() )
+			{
+				var path = new CKEDITOR.dom.elementPath( range.startContainer ),
+						block = path.block;
+
+				if ( block.is( 'li' ) || block.getParent().is( 'li' ) )
+				{
+					editor.execCommand( 'outdent' );
+					return;
+				}
+			}
+
 			// Determine the block element to be used.
 			var blockTag = ( mode == CKEDITOR.ENTER_DIV ? 'div' : 'p' );
 
@@ -80,13 +93,6 @@
 			}
 			else
 			{
-
-				if ( isStartOfBlock && isEndOfBlock && previousBlock.is( 'li' ) )
-				{
-					editor.execCommand( 'outdent' );
-					return;
-				}
-
 				var newBlock;
 
 				if ( previousBlock )