but i just found this: http://s3.amazonaws.com/awesome_screenshot/800992?AWSAccessKeyId=0R7FMW7AXRVCYMAPTPR2&Expires=1348589558&Signature=NWtXphiO%2FyMmXmurJ%2FuvSqYG0w8%3D its from this thread: http://www.xpgamesaves.com/topic/43699-problems-with-minecraft-read-this/#.UGHVZI2TtnM
no, there is no possible way any mojang updates will fix your broken corrupted saves. you could try to decompress your savegame.dat and remove all the items manually in hexedit