Please help! Corrupted x264 video preview/output in AviDemux

[bigshotceo]

Right now I'm trying to make some clips of my x264 mkv videos using avidemux. However, whenever I seek though the file to set my cutting points, the video corrupts and doesn't output properly. Does anyone know what's doing this? I've included a picture.[/img]

[meshead]

I have the same problem with all mkv video i try in avidemux - I've been trying it for months now withdifferent builds/settings/movie files and I always get this problem.

I'm interested in your set up

I'm running sp3 MCE with a q6600, ati 3650, 2gb memory on intel 975x