Apple has started up a new program called the "MacBook Bottom Case Replacement Program", and offering to replace the bottom of any affected white unibody MacBook purchased between October 2009 and April 2011 free of charge. The issue is with the bottom rubber surface of the white unibody MacBook that may separate due to issues with the glue that was used. If your MacBook is affected, you've got two options to get yours fixed. Take it into an Apple Retail Store and have it fixed there or you can do it yourself by ordering the free replacement kit online from Apple complete with screws, a screwdriver and instruction. I say do it yourself.