hello. i have just done a re-install of vista on my pc and i am having issues w/DF. i had DF installed previously with no problems. i have a 24" at 1920x1200 and a 22" at 1680x1050. using an nvidia 9600gt. i am trying to set monitors with different wallpapers. when i apply settings,the images are split ,showing both wallp's on both mons,AND split into 4 sects. when i open desktop background in windows,the tile selection is checked,but when i check stretch the "quarted" part chages but still has split on screens. i have screenshots attached. i hope setting are visable. any advice aprreciated.

Have you tried the third option in Vista, followed by setting the Stretch option in DF (in that order)?

It does look like the same symptom with the problem I had caused by DPI scaling (Adjust font size (DPI) in display properties)
If you go to DF's settings-troubleshooting, you should be able to verify that whether DF got your screen resolution right. I think DF got the resolution of both screens wrong (due to DPI scaling, I believe), if so, here is the solution:
http://www.binaryfortress.com/Forum/index.php?topic=537.0