Index: /CKEditor/trunk/_source/plugins/selection/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/selection/plugin.js	(revision 5308)
+++ /CKEditor/trunk/_source/plugins/selection/plugin.js	(revision 5309)
@@ -161,4 +161,13 @@
 								// Disable selections from being saved.
 								saveEnabled = false;
+							});
+
+						doc.getWindow().on( 'blur', function( evt )
+							{
+								// IE before version 8 will leave cursor blinking inside the document after
+								// editor blurred unless we clean up the selection. (#4716)
+								var env = CKEDITOR.env;
+								if ( env.ie && env.version < 8 )
+									editor.document.$.selection.empty();
 							});