Thread:Project:Support desk/Notice: Undefined property: DatabaseMysql::$mTrxDoneWrites in D:\wiki\TechWiki\includes\db\Database.php on line 512/reply (9)

I'm getting this problem when I try to generate a new password, as well as when I try to manage user rights in the Special:UserRights page.

Mediawiki 1.20.1 PHP 5.3.3 MySQL 5.0.95 Apache/2.2.15 (Red Hat)