I also pre-ordered for the, Limited edition, but was not able to redeem my code.
Wasn't till I decided to try logging in via Chrome - ver 8.0.552.237, that I managed to redeem it. Have yet to check if content shows up in game, but received an email 5 minutes after redeeming.
I was using Firefox 3.6, then 4.0. For some reason, my login details did not work, when trying via Chrome initially. I had to click to have my password reset, and even then I re-entered the same password; saved it, and logged in.
Rather than access the page through the game, I went straight to the webpage.
Since this worked, I thought I'd try updating my profile using Chrome, because I've had issues doing it via Firefox. Sure enough, I was able to upload a pic of my rig, and add hardware info about my PC.
----- Update -----
I've just tried to log into my in-game account. Premise being, I normally use my old Gamespy name and password to gain access ever since the demo. Like some others, I was not able to create a gamesas account via the game, so when I created it through the website itself, the game didn't seem to recognise it.
Earlier, I mentioned how I was able to redeem my code, and make profile changes through Chrome, whereas I was not able to using Firefox 3.6/4.0.
In order to login through Chrome, I had to reset my password, as it didn't seem to recognise it. In the meantime, I was still able to login via Firefox, using the same username and password.
When I received the email to reset my password, I clicked the link. It immediately opened up Firefox, as it's my default browser, and was already logged in.
I decided to re-enter the same password anyway, as my new password; saved it; loaded up Chrome; typed in the gamesas redeem website, and successfully logged in !!
Was prompted for my code straight away; I entered it, and was told it had been successful. Five minutes later, I received a conformation email.
So far so good !! Now, I load up Crysis 2, and attempt to access my in-game account. As I said before, I use my Gamespy name and password to log in.
This time however, I was not able to. Came upon a familiar message, informing me that my username or password was invalid.
Having 'reset' my password earlier, I thought to try using my gamesas account details. That didn't work either.
I then decided to use my Gamespy user name, but my gamesas password !! IT WORKED !! Was then presented with a message saying that my bonuses had been unlocked, and proceeded to the multiplayer UI.
Seems like there could be an issue with gamesas and Firefox, particularly where form registration is concerned.
That, or Google are using nefarious tactics to capture a popular audience