Per Apple’s support document, they will now fix the issue with the rubber bottom on the white unibody MacBook coming off due to issues with glue. This applies to any MacBook purchased between October 2009 and April 2011. The program is available free of charge via your local Apple Store or Apple Authorized Service Providers.
Apple has determined that under certain circumstances the rubber surface on some MacBooks may separate from the bottom case of the system. MacBooks shipped between October 2009 and April 2011 may experience this issue. Apple will replace the bottom case of any affected MacBook, free of charge, that exhibits the issue.
There’s another option, too.
A self service is available as well where you order a replacement bottom case kit online. The free kit includes a new bottom case, screws, a Phillips head screwdriver and instructions explaining how to remove the bottom case and install the new one.
The MacBook Bottom Case Replacement Program covers the affected MacBooks for two years from original purchase date, Apple says. They will also issue a refund if you have paid for a repair or replacement due to this issue. The program does not extend your standard warranty in any way.