for me there a too workarounds now.do you have the same motherboard?nope. I have a Epox 8KHA+ (VIA KT266A) and a Matrox G450. I don't know, what I could do about it. So I stop using overlay mode after and writing a few emails and testing diffrent bios-options, X configurations, X versions viewer programs as xawtv, tuxview and lots of new drivers...