I have a Powermac G3 MT (upgraded to G4 500) with OS 10.2.8 on one hard drive and OS 9.2.2 on another. When I want to change the boot disk back and forth, I have no trouble changing from the OS X boot to an OS 9 boot, but when I try to go back, it's as though the "Startup Disk" control panel in 9 doesn't work. It will let me select the OS X as my startup disk, but when I go to restart, it boots back into the OS 9. The only way I can get it to go back to booting from the OS X disk is to disable the OS 9 system folder by removing the finder. This usually crashes the computer, but when I go to restart again, it will by virtue of no other choice, boot into the OS X volume. I tried re-installing the OS 9 to get a fresh copy of the "Startup Disk" control panel, but it made no difference at all. I also tried increasing the memory allotment to the control panel, again with no results. Has anyone else heard of this problem and can offer a possible solution? By the way, holding down the "Option" button during startup has no effect on this "older" Mac.