My Mac Pro 2006 DVD (Sony D-150A) drive is being flaky--it will read replicated CDs & DVDs, read and burn CDRs, but not DVDRs of any kind--video, data, + or - media. I can record DVD data/media, it just won't play back. Anyone else experience this particular issue? Wondering if a lens cleaning disc will do the trick, or if I should just can it. Seems that ATAPI drives are becoming difficult to find--anyone know if a generic drive will work, or do I have to invest in a "Mac" only drive?