I haven't noticed any flickering anywhere else. It's a single display system (Spare HTPC in my System Specs). I'll try and grab a video for you.And this is the only part where you see flickering, or the only part you have checked?I'm watching TV at the moment and there's no signal dropout or breakup/glitches but I'm still seeing the problem with the EPG.There is also bad continuity error in the logs - it looks like the signal dropped out for about 2 seconds, this will cause the GUI rendering to stall since the screen will only update (if playing video) when there are video frames to render.
Could you post a video of this on youtube so that we can see what you are seeing?
Is this on a single or dual monitor setup?