I just bought an A06 and am using the software that came with it (Ulead MovieFactory 2.0). I'm trying to do a simple task like burning several Mpeg files to DVD-RW, but it has made 2 disk unreadable even though it gave no errors and said it was successfull. I mean, I can't erase them or anything. Basically $5 coasters. I'm about to RMA the dang thing, but I thought I would see what others had to say. Also, a friend reminded me that I need a bigger power supply. Ever heard of that causing this problem?
You don't mention what brand of discs you used, but have you tried different brands? I doubt the power supply would have anything to do with it. I have an A05 running on a computer with a 100W power supply (very low) and a 600MHz processor - and it works!