I'm using Twinview with Oneiric 64bit with a nVidia card.
I have my primary monitor (with DVI) positioned to absolute 0 and my secondary to the right (with HDMI).
My applications open on the primary monitor but all dialog boxes like the following opens on the secondary
- reload confirmation on firefox
- Save changes to document on gedit
- admin passwords
So when my secondary screen is not on, I am forced to each time Alt + F7 in order to move the new box on the primary display
That's also doing it with some application windows but I got it corrected with CCSM Window Placement
This question seems to be already asked but my problem concerns dialog boxes.