The newest and extremely long patch for https://www.trueachievements.com/Battlefield-3-xbox-360.htm
hit Sony's PS3 a few days ago, and now that it has passed Microsoft's labyrinthine, torturous certification process, it has gone live for Xbox 360 as of today. The list of fixes was covered previously, so I'll link you to that
rather than take up another whole page in this thread.
Things like fall damage, vehicle behavior, and weapons damage were all addressed after months of communication between DICE and BF3 fans. Expect the hefty update next time you put the disc in.