Black borders on the right and left side of the screen

Hi everybody.

I'm playing EBII for a while and I'm enjoying it very much.

But since a while a have a problem with the screen.

I play fullscreen, but now I have on the right and the left side of the screen big black borders/bars.

How can I change back to "real" fullscreen?

Thanks a lot for your help und sorry for my english!

It's related to your graphics drivers, I had same issue on one of my laptops.