I have a SuperDrive on my 13" MacBook that sometimes will spit out the disc that I insert 4 or 5 times before it takes the disc. Once it seems to take it, whatever I'm doing (software install, CD burn, DVD burn, etc.) works fine. Do you know if this may be a minor repair or could I potentially be looking at replacing the drive? I have an Apple Store nearby, so I can always take it there if it's something minor. Thanks.