First of all, I love QuickSilver. But I have just loaded the new Snow Leopard OS onto my iMac and QuickSilver no longer works. Can live without QS, and it is probably more a reflection on Snow Leopard than QS, but it is a shame. Have read that some people have been able to get QuickSilver working after installing Snow Leoard however the Quicksilver preferences page will not work, which, by all accounts, is quite annoying.