yeah i did the same, i guess it fixed it for now, but i already got a lock up on the whole system and i have to shut down with the power button. also safari crashed a few times.. i never had these problems before..
sorry but permissions and resetting SMC would probably not help (but dont quote me on that ). try deleting Finder's plist in User/Library/Preferences or figure out if any third party apps could be at fault.