If a user renames himself not all his contributions are moved under the new username. See the provided URL for an example.
Version: unspecified
Severity: enhancement
URL: http://ar.wikipedia.org/wiki/%D8%AE%D8%A7%D8%B5:%D9%85%D8%B3%D8%A7%D9%87%D9%85%D8%A7%D8%AA/Mohammed_Khalil