Dave - screens from the campaign starts here:
http://img40.imageshack.us/img40/214...7031326389.jpg
http://img6.imageshack.us/img6/5548/...7031326100.jpg
The text for 'Cliffs of Dover' is different to the way I remember - initially I just thought 'oh, new pics, nice..' before it started to dawn on me. I first noticed the difference in the 'Cliffs of Dover' text. I'm 99% certain the images were different, though of course it's impossible to check as I don't have screens from the old install. I'll be very interested to hear if you have the same ones!

My Steam Cloud is disabled, though I do have CloD still set to auto-update.
@ Bryan & Zaltor - Sorry to hear it didn't do any good.

I would consider deactivating crossfire if at all possible, my experiments with single & double gpu's have always shown markedly increased stutter with two cards. Why this happens I don't know, but a single gpu has always performed better. Have you done your reinstalls recently (i.e. as a result of this post), or was it a while ago? Only reason I ask is that I've reinstalled before and seen little improvement, but my reinstall post-latest retail patch has given me the improvements in the OP.
Edit: included mission flavour image with no AA:
http://imageshack.us/photo/my-images...031339050.jpg/
Little hard to see as it's not full screen size in the browser but if downloaded should show the lack of AA. Not all mission flavour images seem to show this, which is even more confusing.