True, I don't want two independent screens. (I didn't know it is called "zaphod".) I want two screens in the sense that they are treated like virtual desktops. Most importantly, when I maximize a window or go fullscreen, it should only cover one screen. Right now, it thinks of both desktops as a single screen and occupies both of them (and is split over both screens). Equally annoying for the same reason are windows opening at the center of the two screens, split over both of them.
Actually, I hate the "one big screen" approach, because it really doesn't work for me - I use virtual desktops a lot, and I *don't* want both monitors sharing the same desktop. Generally I have one large monitor for doing work on, and a smaller one running a Windows VM for testing, and I don't want to switch desktops on the former and have the latter disappear. They're separate monitors, and should act like they're separate.
AMD has supported GL 4.1 since last month. Suck that, Nvidia!
On a more serious note, Nvidia's drivers are completely broken with multi-monitor setups. No autodetection, no ability to rotate individual monitors in TwinView, broken vsync, no randr, invalid refresh rates. It's a huge, steaming pile.
Do these drivers fix the OpenGL crashes caused by 260.xx? The previous drivers broke multithreaded OpenGL.
No randr support for nvidia sucks. By habit I always go for the KDE or Gnome monitor settings to set resolution. ATI wins here.
Oh, and I agree, Give me one single big ass screen and a few virtual desktops and I am happy.