I noticed some slowdown strangeness on my G5 (10.3.9) and ran disk utility. It reported this error "Invalid extent entry. Volume check failed. The underlying task reported failure on exit. (-9972)" I booted from an external drive and ran Tech Tools Pro 4 and it found a bunch of stuff and fixed it. I reran TTP twice and it reported everything fine both times. However, when I rebooted from the startup drive and ran Disk Utility again, I received the same message. I repeated the Tech Tools Pro followed by Disk Utility cycle again and TTP reported no problems and Disk Utility gives the same volume check failed message. Any suggestions for fixing this? How hosed am I? Do I need to reformat and reinstall everything. If so, I'll wait until Tiger comes out and do a reformat and a clean install of Tiger. In the ensuing days, however, I'd feel better if I could find an interim fix.