I have a MBP1,1 completely updated and OS 10.6.4 is now experiencing repeated hanging sessions where the beach ball shows up for 20 seconds at a time. I tried repairing the disk and repairing permissions, both with the disc upon startup and just running OS X normally. However, each time I repair, the same 3 files are always fixed and a 4th file that was not being able to be repaired at all. I don't think it's RAM problem because Windows runs smoothly, but this issue is frustrating. Should I just reinstall OS X, or does anyone out there have any advice as to solving this mess?