I have seen the same problem on a system with nvidia graphic card GeForce2 MX/MX 400 when running with the proprietary nvidia driver. After changing the driver from "nvidia" to the open-source driver "nv" in the X server configuration file, the problem disappeared.
X server: X.Org Debian 6.9.0.dfsg.1-6 NVIDIA driver: 1.0.8178 _______________________________________________________________ SMS schreiben mit WEB.DE FreeMail - einfach, schnell und kostenguenstig. Jetzt gleich testen! http://f.web.de/?mc=021192 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]