Uninstalling and reinstalling did the trick! Thank you both for your suggestions.
After I upgraded from 2.1 to 2.2 I found a widget called "feeds and faces" or something like that. I'm not sure if it was there before, but I really like it, it shows feeds from Twitter and Facebook. I find that I don't have access to this widget when LauncherPro is installed. Anyone know how to fix this?