Hi, For the last couple of weeks or so I've been getting regular, but not always a flickering vertical line of pixels about 2" into the edge of my 20" widescreen LCD. This seems to happen under Gnome, PWM, Window Maker, but NOT when I play a DVD, or play a game in full-screen GL mode, so I'm somewhat suspecting a problem with <a href="http://X.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">X.org</a> (but could be wrong?). If I turn the monitor off, or change resolutions it goes away, then a few minutes later it starts again. The machine is using the non-free Nvidia drivers with a Winfast A340 (Leadtek) graphics card, at a resolution of 1680x1050, has anyone seen anything similar, or got any suggestions I could try?