I know a lot of people were complaining they were having programs crash when they installed Summerboard on 1.1.1. I've had it installed for quite some time with no issues. Then yesterday I installed a new theme and selected to have Summerboard dim the background. I had nothing but crashes after that. I finally figured out that what I changed. I changed it back this morning and the crashes haven't happened since. So I'd recommend trying that if you were having issues.