The disc can’t be burned; it might be incompatible with this disc drive. Please try a different brand of disc, or try burning at a slower speed.

you are probably in luck. It’s does not seem to be some sort of firmware error or anything wrong with the disk you are using. It’s simply the SuperDrives laser that has gotten dusty and needs cleaning. Simple find a creditcard and a t-shirt with long threaded weaving. Use the creditcard to hold the cloth wrapped around and insert it into the SuperDrive and carefully move it back and forth whilst applying a little force downwards. The optical sensor should be on the left side, but I cleaned both sides.

Note, if you are within warranty you should not do this at home. I guess mighty Steve would void your ass back to outer space if he ever saw you doing it… For some pictures of the madness, head over to PicasaWeb.