Help: "Fatal error: Call to a member function isListed() on a non-object"

I just installed this on my wiki, and I'm getting the following error.

Fatal error: Call to a member function isListed() on a non-object in /home/wepwtorg/public_html/wiki/includes/SpecialPage.php on line 210

How can I fix this?

- Carissa

hmm, what version of MediaWiki are you running, and which version of this extension?

If you're running a recent version of MW (1.13+) try downloading the development version from here:

User Merge & Delete: 1.6.1 MW: 1.6.8