I just installed MediaWiki 1.10.0 last week on a new Ubuntu 6.06 LTS server running Apache 2.0.55, PHP 5.1.6, mySQL 5.0.24a-Debian_9ubuntu2-log. Everything was working fine last week and this weekend until Sunday, when it became impossible for any users to login, including WikiSysop. The following error message comes up: Login error: You have not specified a valid user name. This happened to me before on an old box, so I got a new box and did a new server install on it. Any help would be greatly appreciated. Thanks. Josh