Index: _source/plugins/enterkey/plugin.js
===================================================================
--- _source/plugins/enterkey/plugin.js	(revision 5812)
+++ _source/plugins/enterkey/plugin.js	(revision )
@@ -263,7 +263,12 @@
 					lineBreak.getNext().$.nodeValue = '';
 				// IE has different behavior regarding position.
 				if ( CKEDITOR.env.ie )
+				{
 					range.setStartAt( lineBreak, CKEDITOR.POSITION_AFTER_END );
+					// Append safe dummy content to move cursor to next line. (#6127)
+					if ( mode == CKEDITOR.ENTER_BR )
+						editor.insertText('\ufeff');
+				}
 				else
 					range.setStartAt( lineBreak.getNext(), CKEDITOR.POSITION_AFTER_START );