problem at splash screen user interface

[Private Who?]

recently whenever I fire up Killing Floor, my start screen looks like this:

[url]http://cloud.steampowered.com/ugc/542897235504751048/A80E53D0E06B4649F2CBBEAC3302DB02D420E93F/[/URL]

I have lost all the buttons for 'multi-player' 'host game' 'options' and all that. If I scroll around sometimes I hear a 'click' sound and a rectangle will sort of highlight. If I click that area it works...but I can't find the area for 'multiplayer'.

I deleted my local content & re-installed the game, but I still have the same problem.

The only change to my system is right before this happened I installed a HD6870 and the newest drivers from AMD. I had been using a HD3870.

 

[Private Who?]

OK I have deleted my .ini, which auto-generated a new one.
After several trials, I have figured out that with my system, using a HD6870 with a 1440X900 monitor with the 11.5 drivers, any amount of AA settings in Killing Floor will hose the GUI prompts at the start screen. I can run AF all the way up to 16x no problems. With even 2x AA on, I have to hunt around for the GUI prompt boxes at the start screen.

update: same issue with 11.6 drivers, released this week.