Index: /CKEditor/branches/prototype/_source/core/_bootstrap.js
===================================================================
--- /CKEditor/branches/prototype/_source/core/_bootstrap.js	(revision 2480)
+++ /CKEditor/branches/prototype/_source/core/_bootstrap.js	(revision 2481)
@@ -40,2 +40,20 @@
 		}
 	});
+
+/*
+TODO: Enable the following and check if effective.
+
+if ( CKEDITOR.env.ie )
+{
+	// Remove IE mouse flickering on IE6 because of background images.
+	try
+	{
+		document.execCommand( 'BackgroundImageCache', false, true );
+	}
+	catch (e)
+	{
+		// We have been reported about loading problems caused by the above
+		// line. For safety, let's just ignore errors.
+	}
+}
+*/