I will go ahead and chime in, albeit hesitantly. I have noticed this on a few feeds and channels, and think it might be related to having a USB drive connected. I hadn't posted this yet, because I almost always have a drive connected, and haven't had a chance to unplug them and fully test out this issue when it happens. It sometimes happens if I watch a recording already on my drive. Other times, it happens with certain channels or feeds, especially certain sports feeds (both when recording and when not recording the programs). I don't use TimeShift, I am using the latest firmware, and I'd say the stutter happens rarely (for me, it seems most common in live transmissions such as on some sports feeds, then on playback of recordings, and least common on fixed channels). Once the stuttering starts, it doesn't matter if I change channels, satellites, or watch a recorded program -- the only way to remove the stutter is to disconnect/reconnect or put into standby and power back on. The next time it happens, I'm going to disconnect the drive to see what happens (I sometimes use a memory stick, and sometimes a powered external hard drive ...both have experienced the stutter).