i am currently running on os x 10.5.1. ive been having problem with the program "spaces" for a while now. sometimes when i switch from screen to screen, it freezes up anywhere from 2-30 seconds. One time spaces froze completely and it prevented my computer from being able to shut down / restart so i had to take out the battery and the ac plug to force restart. should i be worried about this? or is 10.5.2 going to fix this bug. any other people having problems with this?