I am testing out 12.04 and am using Xinerama = 1 in xorg.conf.
When I do this, everything seems to work, except that some applications end up with strange looking buttons.
Please see this image: Click here for an enlargement of the image.
As soon as I change the Xinerama to 0, I lose my quad screen, but all applications look normal again.
Why does this happen and is it possible to fix this?
I'm using gnome classic on Ubuntu 12.04 because I couldn't get Unity2D or Unity3D to work over 4 screens.