I just recently started experiencing this. When i click on the iCal app icon on my dock it initially lifts up and sits back down. When i click it again it bounces 8-15 times and sits back down on the dock. The app won't open and i dont know why it is doing that. I cant delete the app and reinstall it since Mac OS X Lion won't let me. Any help would be appreciated since i use iCal a lot to keep track of appointments and meetings