I have seen way too many threads on this so i though i would make ONE informative post. MS has banned all public keypairs (KV.bin) so files resigned with them WILL show up as corrupt, they have NOT done anything else to prevent CON resigning. The fix: Get your own private keyvault and dont give it to anyone. Or: have 2 xboxes, have one updated with the NXE and another without as an offline box. load your resigned file on the offline 360 and re-save it in game. doing this puts your own keypair on the save, making it not be corrupt in the NXE. A keypair is a series of numbers (keys) used to calculate a signature. each 360 has a unique set of numbers. So all MS has to do is ban the public ones to make all files resigned with them show up as corrupt. To get your keypair you need either a launch console that has never been connected to LIVE with a dash version 4548 or lower. OR an Infectus 2 modchip to downgrade to that dash version. either way, it is not easy,So I will not go into more detail on how to do this here. If i see any more threads on this they will be locked.