Originally Posted by netllama
Were you using the same nvidia driver version previously when the behavior was as desired?
If you set NoTwinViewXineramaInfo to false in the Device section of your X configuration (and restart X), does that change the behavior to your liking?
I tried NoTwinViewXineramaInfo with false, no difference.
About the driver, yes, I was surely using an older driver by then. I will try an older driver, but I don't remember which one I used back then thou.
EDIT: Tried a few older drivers, no difference.