Snow Leopard has been giving me numerous little problems of late. The latest problem I've encountered is trying to install Quicksilver. When I go to add plugins the program shuts down (message reads application has shut down unexpectedly). When I click relaunch, I see the QS as if its launching... then nothing happens. Unable to launch the program. I hit control spacebar, and it doesn't launch. Any suggestions? I've got to tell you this is REALLY bugging me. There was absolutely nothing wrong with this brand new iMac until I upgraded to Snow Leopard. Please help. Thanks in advance for any help you might have.