After updating to 10.3.9, when I shutdown the G4 all is ok, until the big 23" monitor switches off, when this happens the G4 turns itself back on and boots up. I haven't done any work to find out if this is the graphics card or the USB interface in the monitor thats causing a COLD system boot. If I leave the monitor on in standby, the G4 stays off.
Booting can be inconsistent, but mostly ok.
I have a 10.3.8 disk also in th same machine that I can boot off, it doesn't exhibit the above.
If I use "shutdown -h now" from the UNIX command line the machine does not exhibit the above.
But no disasters