I don't buy into the 6.18 drivers do not support overlay. That is wrong. If they did't support overlay then you would have no RealPlayer, MediaPlayer or DVD. I use the 6.18 drivers with an ATI TV Wonder and it works perfect, overlay and all. Hell, I think the drivers have an overlay control tab in the control panel applet. I have found out that changing anything in there from it's default screw up my tuner. May want to check there and reset to default and give it a go. Also, check your desktop color depth, resolution and refresh rate and try a few different ones. Lastly, try to "Force Primary" under the Hauppauge entry on the start menu. I switched from Hauppauge to ATI after almost 2 years with the Hauppauge crashing. The company updates it's drivers like every week and although driver support is important, updating drivers too often is a sign of problems.
LJ