"Plugin" dialog in site administration is "jsut a white page"?

Please fill out the following form and take a look at the linked pages. The more Gallery version (not just "2"): SVN 16341
PHP version (e.g. 4.3.11): 5.1.6-1 (Debian)
Webserver (e.g. Apache 1.3.33): 2.0.55-4.1 (debian)
Database (e.g. MySql 4.0.11): 5.0.32-7
Activated toolkits (e.g. NetPbm, GD): GD, ImageMagik
Operating system (e.g. Linux): Debian Etch
Browser (e.g. Firefox 1.0): IE7 / FF 2.whatever-is-current.

I upgraded my svn, and after the upgrade, when i click on the "plugins" link in site admin, i get a blank white page. I see no error in Apache Logs.

Everything else seem to work tho.