I had this problem on my work machine, it seems that SVN 1.0 contact list themes aren't backwards compatible with 0.89. Upgraded to 1.0 and it worked.

It's a personal mod called v23evolution. The current version is unreleased, but you can download an earlier version from http://unitygk.com/blackvanadium23/

The gradient is an error that was fixed in the download, I'll fix the preview shortly.