I simply remove all file from the "dta" and simply remove the " keycode.txt " file located root of the game, and i have move the save folder in the other folder (from the document folder) , and then I re check file from steam . Now I can turn, is just very very slow ... ( with / without acceleration mouse) but it is already well ... we progress ^^' and sorry AGAIN for my bad english... [juste move (don't remove) the save folder to a other folder... i thing the prob is from this, dont delete the other file]
ps : If you have the bug, and if you zoom, it's possible to turn left/right, but you will stay with the zoom .... and i'ts not a bad key binding or conflict (in the keyboard config)