"The patch "base\world\maps\Northrend\Northrend_22_23.adt" could not be applied. (CRC mismatch: expected 0xe4d530de, actual 0xe7600834.) If this problem persists, you may be able to solve it by uninstalling and then reinstalling the game. If you are unable to correct this problem, please contact Blizzard Technical Support. (BNUpdate:
TCApply)
To check this installation for problems, click the "Repair" button. The Repair tool can automatically fix many update errors."