Here's the story- I inherited a 3+ year old MacBook (2GHz Intel Core Duo, 2GB RAM) that was working fine until I dropped it! After that, it was very slow to start up and wouldn't open some applications, so I bought a new hard drive and reinstalled the OS and now it's back on its proverbial feet. The problem is, since it was actually not my computer to begin with, when I booted up from the 10.6 SL DVD, I opted to do a full install from the disc and re-register it under my name. Then I used migration assistant to transfer all my applications and data from a Time Machine backup. Now all the disk permissions are off and I'm locked out of some applications and folders. I tried using DiskWarrior, OnyX, and the SL DVD to repair permissions, but they never actually repaired, just detected. Should I just reinstall the OS at this point and start again from scratch? Any ideas?