My turn - I ordered and received ( 2 ) 24" Imacs 2.8 750gb Imacs on September 4. I upgraded both with 4GB of OWC. One has been flawless and the other has the freezing issue with 1.1 Tiger and with Leopard it freezes every 5 minutes and is unusable with Leopard. I think its time to call apple and have this issue addressed, because once you have a working Imac like the other one I have, it proves to me that something is seriously wrong with the freezers that no software fix is going to make better and I don't have the time to deal with this BS. Goodluck to all.