Same for me. I believe the problem lies in the wrong calculation of the virtual desktop-size.
I got two 1280x1024-Monitors, and in xorg.conf the follwoing parameter is set: "Virtual 2048 2048"
It should be: "Virtual 2560 2048"
If i change it manually, it works immediately.
@Koterpillar: Your x-size seems to be to small. Try to set it at least to "Virtual 2304 1624" (or greater) and try it again.
Same for me. I believe the problem lies in the wrong calculation of the virtual desktop-size.
I got two 1280x1024-Monitors, and in xorg.conf the follwoing parameter is set:
"Virtual 2048 2048"
It should be:
"Virtual 2560 2048"
If i change it manually, it works immediately.
@Koterpillar: Your x-size seems to be to small. Try to set it at least to "Virtual 2304 1624" (or greater) and try it again.