I just got a refurb G5 1.8 (olde rmodel) from apple and I notice it seems too freeze alot and often does not reactive the main screen via the adc-dvi port when waking from sleep (i have two screens - the dvi port seems to work ok). Anyone have this behaviour? any ideas? I have updated all software, inlcuding firmware update. Of course, this is intermitment and i have not had a chance to call apple care yet.