I have a core duo macbook from 2006 with a combo drive. Since the summer its developed a problem, where when I insert a music CD, it spins up twice, then spits it out. It usually takes around 7 to 12 attempts before it mounts. Ive tried lots of disks, this dosnt happen when I put in a CDR or play a DVD. Ive tested lots of CDs, it seems to only happen with ones I have bought recently, which are mainly between 2006 and 2008, although the oldest cd I bought recently was released in 2003. All older ones I tested work fine. Its not limited to music genre either, Ive tried everything from Rap to Metal Anything I can do, or do I need to get it replaced? I have a 5 year warranty with John Lewis, where I bought it.