Index: trunk/core/units/users/users_tag_processor.php
===================================================================
diff -u -N -r7391 -r7855
--- trunk/core/units/users/users_tag_processor.php	(.../users_tag_processor.php)	(revision 7391)
+++ trunk/core/units/users/users_tag_processor.php	(.../users_tag_processor.php)	(revision 7855)
@@ -184,7 +184,8 @@
 				return $submit_value;
 			}
 			
-			return $this->Application->GetVar('save_username'); // from cookie
+			$username = $this->Application->GetVar('save_username'); // from cookie
+			return $username === false ? '' : $username;
 		}
 
 	}