I'm on my fourth machine! Brand new G5 2.5 it has the same screen and fan issues as the third which went in for three weeks only to come back with the same problems. I've now also been offered a replacement for the fourth machine. I'm wondering about generic hardware faults with the 2.5 and if these could be resolved with a possible revision in June WWDC. Should I get the replacement or go for a refund and (su*kup) the extra memory and Drive I bought. Revision might have DDR2? but also revision might be 6 months away? http://g5support.com/group/viewtopic.php?t=3654 This post got me baned at apple forums so if this is not appropriate please let me know.