This has happened at least two times now. (Update 4/18/11: Happened 3 times now.)

Any time Crysis 2 is updated, I have to go through the whole setup phase (As in "TV" brightness, Terms and Agreement stuff) and I find that any progress I had in the game has been removed.

The first time it happened was on my birthday, April 7th. The game was updated and I lost all my campaign progress. I was half way through Posthuman before I lost the data.

Now I turn on the game again today and it seems to have deleted the campaign data once more. This time before this I had actually completed the game on Posthuman. To me playing the game on Posthuman is more stressful that it is difficult, the AI pull ridiculous stunts (appearing out of nowhere, massive damage in a few short seconds) and most importantly, the Pinger fights are terrible in Posthuman. The reason?

Mainly it's due to the JAW. Sometimes if I reload a save (as in die and respawn) I someone lose a rocket from the JAW. (Say I had 5 rockets, as in 1/4. When I respawn I sometimes have 1/3 instead of 1/4. Picking up another rocket does not add to my count, but REMOVES 1 from the ammo count, so now I have 1/2 instead of 1/4 like I should have.)

Sigh.

It just happens in the morning for me, for first time

I had already upgraded C2 to v1.2 on April 4th WITHOUT any problem, and this morning, when i launched C2 IT LOSTS EVERYTHING:
*License Agreement
*Profile & S/N //11h55: just remaining the name of my profile
*KB Shortcuts
*NanoCatalysts
*SOLO progression, kills, stats...

Only 2 things still OK:
*MP progression (but i stopped at lvl5 not to loose any other progression)
*Saved Games (but w/o any catalysts)

So, when should we CORRECTLY play & when will we have a FULL game ???

//11h55:
I had a big game freeze yesterday night, it was my last session game in SP & needing a system restart.

Same thing happened to me. Game crashed and when I rebooted it said I couldn't login. When I finally got in, my campaign data was lost.

Well Crysis 2 deleted my campaign progress once more. Good thing Crysis 2 keeps the saves, I could just load the save closest to the end and finish it that way.

My multiplayer progress is untouched, by the way.