Anyone else have similar issues? I've tried a couple of xvids so its not the file. I'm trying to watch them in Gallery and after around 1:30m-1:40m the sound cuts out. I can get sound back for a little bit by locking the screen then coming back. I've tried rockplayer as well and using HW decompression I get exactly the same issue but it's ok when using SW except the video quality is slightly poorer. Actually I'm also finding the occasional stutter too on the xvids which never happened on my iphone. I'd have thought if my iphone can watch ok, the Sensation would be flawless. But it's not. MP4 works fine by the way.