I originally posted this in the "list of issues found in Crysis 2" post but I thought I would start a thread so more people would see it, anywhere here it is:

I believe I have a temporary fix for the grain/static bug. What I did that seems to have worked is SIGN OUT of your XBOX profile and load up Crysis 2. Decline when it asks you to sign in to a profile. Then start a new game and wait until you have control. Then SIGN IN to your profile while you are still in the game. You will be redirected to the title screen, then simply pick up wherever you left off, this should work. I believe the bug has to do with the saved game in your profile, and doing this work around re-sets or changed back whatever causes this bug to happen. Since originally posting this fix I have played for several hours and the bug has not returned so I believe this is definitely at least a temporary work around. Let me know if this works for you guys, and pass along this information. Thanks.