Lemme try to reboot. It seems to work for me for now.
I use spotlight, quartz debug.
Then do exactly the same, except I right click the icon in the dock, press option and quit turns into force quit. And click that, it'll quit. And it'll stick.
Actually, it isn't stick for me either. I really wish Apple will simply fix the VSync code to sync all things to 60fps rather than 24fps. Heck without the sync the FPS is rediculous. Dock makes the FPS meter shoot up to 90fps, with the sync it only shoots to 10fps. Pathetic.