Sven2157 wrote on Jun 22^nd, 2012 at 2:20am:

When you repair FSX, you MUST uninstall Acceleration/SP2, and then SP1.  Preform your Repair, and then install SP1 and Acceleration/SP2 again.  There is a bug in the repair function after the initial release.  Don't worry, you won't loose any of your planes!  ;)

Sorry but I beg to differ! I always run the repair without uninstalling Acceleration/SP2 or SP1 first, and it has fixed it up every time! And I don't lose my planes doing it that way either.