UltraVNC

Win7 ultimate x64. Two monitors, primary to right. When viewing primary monitor, it is fine. Click button for full desktop/switch monitor toggles between primary screen and full desktop. In full desktop, attempt to use secondary (left) portion of the screen is completely unstable, with elements of ...

There is a problem with the new two-display without driver option. If your right-hand monitor is the primary display, then this option does not work - the cursor always ends up at the left-hand edge of the left-hand monitor. Switching so left-hand display is primary results in correct operation.