Earlier the other week, users started complaining about losing all their save data in Carmageddon. Stainless quickly identified the issue as a Game Center bug and offered a doozy of a fix that involved having the game's users doing Airplane Mode and task bar voodoo.
This update theoretically has just solved the problem straight-up, but we're not so sure if people are getting their lost data back as they update. Signs seem to point to "no," which is probably a bummer for anyone that really attacked the game in the wee hours of its release. At least you had fun, though, right?