Yes, same here.
Hope we get an updated trainer soon.
I was just thinking that I should block updates to keep the trainer working, but now it's too late...
I thought about blocking updates too... the steam patch that worked with update 3 seemed to be the most stable for me but because the game itself is so buggy I am holding out hope that they (the developers) will finally push a patch that will clear up the lagging, glitches, crashes etc. and then we can have a stable game (along with our ALWAYS stable trainers from CH) and I can finally play this game from beginning to end without having to restart it or my machine 10 times. This one game has damaged the COD franchise.
Extra thanks should go to the folks at CheatHappens though for keeping the trainers updated each time a patch is released. At least we can rely on that.