[Mediawiki-l] error question

[David Doonan]

Any idea how to resolve the following error message:

Fatal error: Call to a member function tableName() on a non-object  
in /wiki/includes/ObjectCache.php on line 409

Line 409 = 			$this->table = $dbw->tableName( $this->table );

The url in question is http://www.gp.org/wiki/index.php/

Repairing the wiki_ObjectCache db table does not resolve the issue.

thanks,
david