Having a very odd problem which I'm hoping someone else will have experienced so I can figure out why it happens.. When I have iDVD encoding an AVI video to DVD my iMac G5 (bought at the start of April 2005) randomly keeps going into sleep mode even though I have it set to never sleep, often while I'm in the middle of doing something else such as typing this.. Only seems to happen with AVI's and doesnt occur with every one. If I close iDVD the Mac operates fine. I'm currently using the DivX Fusion Beta 2 to allow me to load AVI's into iDVD although I have had the same issue using DivX v5.1.1. I can play the file perfectly fine in Quicktime Player under the same codec without the Mac going to sleep so it appears the problem is with the iDVD app.. I'm hoping someone else will have experienced this problem and found a solution as its proving pretty frustrating..