This is more of an annoyance than a bug, but... when you install a new application into the Applications folder via drag-install, then attempt to invoke it from the Applications folder in the Dock (it's there by default in Snow Leopard, but you had to add it manually in Leopard), the new app has a generic icon with a white disabled sign over it. It still works, and launches okay, though. Rebooting the Dock (either by logging out and back in, restarting your Mac, or typing "killall Dock" at a Terminal prompt) fixes it. Anyone else have this issue?