When you start the game on the second Xbox, pause and select Unlock Full Game.
Choose Download Again (this is a tiny download, not the whole game).
When the download is complete, press B to return to Braid’s menu which is now unlocked.
Select “Exit Game”, “Yes (go to the sign-in screen) to load your current progress.

I have experienced this same issue with Puzzle Quest, you would think the Microsoft Certification process would test for this situation.

I don’t want to go into too much detail, but: all kinds of Leaderboard functionality has to be implemented when in fact it should be a core library that you just use; all kinds of user sign-in-sign-out-working-around-bugs stuff has to happen, when they could at least fix the bugs or else provide a mode for single-player games to not have to deal with that junk; weird parts of the API like users having different XUIDs when online versus offline, which makes things needlessly difficult and confusing; having their APIs refer to users by user index (which may change before you actually can make the call!) instead of XUID, which means it is in fact impossible to comply with all these requirements in the first place! — you just have to muddle through and do the best you can and program lots of failsafes. There is no reason for any of that if you could just use a damn XUID.

It goes on from there, those are just the ones I remember off the top of my head.

please stop by and read shacks comments, there’s been LOTS of discussion in the chatty threads also. Census is that the game is awesome but some good points are brought up in the front page comment page that i posted above.

Please stop by Jonathon.

I hate that their will not be any level or DLC for the game on the 360. Please keep up the developement on the PC at least. I’m sure you will get plenty of support on that platform.