Glint on keyboard input under Gnome

[royan <royan@rootpower.de>]

Hi everybody!

I'm experiencing a problem which occurs in most applications under Gnome.
On every key press the screen glints at a random position (seems to be a
black line, 1 px height, ~50px width).

Any ideas where to look at?

Thank you in advance.

Regards,
Helge