Hi, I have a pioneer 105, and whenever i burn discs using any kind of media, i have a problem where the middle of the disc seems to burn differently to the rest of the disc. If you can imagine a disc perfectly burnt from one end to the other, then when you get to the middle it seems to go darker, almost as if nothing has been burnt on that part, the strip (if thats what youd like to call it) is only about 5 millimetres wide. They seem to play back ok, but when I go to read it back it it always fails. Ive tried burning at 2x with no probs, complete ok all the way through. Anybody had this kind of problem. TIA