Index: _source/plugins/link/dialogs/link.js
===================================================================
--- _source/plugins/link/dialogs/link.js	(revision 6913)
+++ _source/plugins/link/dialogs/link.js	(working copy)
@@ -1174,7 +1174,7 @@
 			{
 				case 'url':
 					var protocol = ( data.url && data.url.protocol != undefined ) ? data.url.protocol : 'http://',
-						url = ( data.url && data.url.url ) || '';
+						url = ( data.url && CKEDITOR.tools.trim( data.url.url ) ) || '';
 					attributes[ 'data-cke-saved-href' ] = ( url.indexOf( '/' ) === 0 ) ? url : protocol + url;
 					break;
 				case 'anchor':