For about the last two months, my powerbook G4 (15' 1.5 ghz, 512 ram) has been getting progressively slower. I have been doing many recordings on garageband 2, and the program seems to lag a good amount. Also, Safari quits whenever my computer is doing alot. Safari can be my only program running, but when i view about 6 pictures at once, the program crashes and quits. I have 28 gb available with a 74 gb hard drive, so i still have some space left. I have done alot of hard drive intensive stuff in the past months, but the computer runs slow even after i deleted a bunch of stuff. Even the finder seems to load slower. Any suggestions?