SystemUI Server keeps crashing at startup

[celticpride678]

Everytime I startup my Mac (running Mac OS X 10.6.4), the icons in my menu bar crash and restart. When looking at Console, I see:

6/17/10 7:27:55 PM com.apple.launchd.peruser.502[98] (com.apple.SystemUIServer.agent[103]) Exited: Terminated
6/17/10 7:27:55 PM com.apple.launchd.peruser.502[98] (com.apple.SystemUIServer.agent) Throttling respawn: Will start in 8 seconds

I have tried:

1. Removing com.apple.systemuiserver.plist from ~/Library/Preferences
2. Repair disk permissions
3. Clear all caches

Any ideas/fixes? Thanks.