I have a dual monitor setup with an ATI Radeon HD 3450 driving 2 Dell 1907FPs in Extended mode. The video driver is ATI's 8.561-081201a1-073177C-Dell.
Onscreen, I have a couple of non-maximised windows that I resize to span the 2 monitors. When the screensaver (any screensaver) starts (or finishes, I'm not sure), the windows are automatically resized so that they fit on one of the monitors only.
Is there a way to stop this from happening?