Hello - I currently have an iMac G5 with a 4x Superdrive. I thought I remembered reading something that said you should only use blank DVD discs that are the same speed as your burner - Can anyone confirm if that is the case and why that's so? I'm wondering becasue when I went to buy some blank discs @ Comp USA the other night, I noticed that 4x DVD-R's were on clearance and everything else on the regular shelves was at least 8x speed or higher. Because of this, I don't know if I'll be able to find any 4x discs the next time I run out. Does it matter if I use 8x/16x/32x media? Or am I wasting my time worrying about this? I never really paid attention to this with the CD burner I had on my old computer, but I thought I read something that it was different for DVD burners. If there are already threads on this, can someone post a link? I tried searching but couldn't find anything. Thanks!