Has anyone else had problems with Brothers-in-Arms DS?

[Driftr]

I had beaten BiA DS (good game, btw) on all difficulty levels.  Unlocked everything, and all that good stuff.  Then, I turn in on to play again just for the fun of it, and it says that the data has been corrupted, and it must be erased!

So, now I'm playing through the game again to recover my lost data.  Has this happened to anyone else with a copy of BiA DS?

[Driftr]

bumpity.