I have got a PowerMac G4 dual 450 with 10.4.11 on it. It seems as though after coming back on from sleep mode, the OS thinks its only got a single CPU! Sure enough, in the system profiler, it reports the box as having a single CPU. After a restart however, it reports correctly as two CPU's. I noticed the computer was quite a bit slower as well, so it is actually not using one of the CPU's when it reports it as a single CPU unit. Any suggestions??