Moving mouse cursor to right edge of screen makes it disappear

[ipsi]

I have two monitors set up on my Asus N61J laptop, but have a weird problem:

When I move the mouse to right-hand edge of the Left (Primary) screen, it disappears. To get it back, I have to either keep moving it to the next screen, or move it over something that will cause it to change shape.

It also happens if I move it to the left-hand edge of the Right (Secondary) screen. Anyone have any ideas as to how I can fix this? It's a little annoying, as it makes it hard to select the Logout/Shutdown/Status menu...

I'm using the proprietary ATi drivers, as that was the easiest way to get my screen resolution working properly.

[ipsi]

Solved. I downloaded and installed the 10.3 drivers from Ati's website (had to lie and say that I had a Radeon Mobility HD 4XXX series card), and now this works fine. Phew.