I've got an 867 Mhz TiBook, set up to dual boot into Tiger or OS 9. I started having problems in OS 9 with the system suddenly freezing. The cursor would disappear and the system would lock up. I'd let it set for several minutes, but the system wouldn't come out of it. The only thing you could do would be to disconnect the power and drop the battery. Obviously, that's not something I want to do repeatedly. Later, it started happening in OS X. I ran the disk utilities in both OS 9 and X, and it caught problems, which I finally ended up repairing by booting from the Tiger disk and running Disk Utilities. I later installed AppleJack, and ran that. Everything seemed to be fine. Until I started having the same problem in OS X again. I got to thinking that this was a problem in the OS, and meant to wipe the drive and do a reinstall. I was going to just install OS 9 first, but the system will not boot from the OS 9 disk. So I've just sort of put it off for awhile. (I have a 1 Mhz TiBook running nothing but Tiger, and it has no problems whatsoever.) I'm really hoping this isn't a hardware problem, but... Any thoughts/suggestions/prayers would be appreciated.