Think what Lewis said in the Yogscast video Krauter posted on page 2 really sums it up:

"The game crashed at one point and it said Modern Warfare 2 has stopped working"

Which I think is bogus tbh, happened to me and it clearly said MW 3 :hmmm:

Unless it said MW2 first and they fixed it before I had a chance to see it myself.

It was before one of the patches, my friend had the same problem. Playing along fine and then the modern warfare 2 has stopped working error :haha:

Just wanted to say, I picked up Red Orchestra 2 on steam the other day, and my hat's off to Tripwire. The level of stupification that Modern Warfare has , becomes patently obvious playing RO2.