While watching recorded programs, the Gateway will suddenly skip forward 30 seconds - something it does intermittently, but fairly often. Rewinding the program doesn't help, it's as if it simply didn't record that 30 seconds of video. Nine times out of ten, it happens in the last minute (or so) of the program - usually before the top of the hour.
I've uploaded a video to youtube showing the behavior - I've paused the picture before and after skips to show the Gateway time-bar in hopes of giving an idea of just how far ahead it jumps:
The clip starts at the 44 minute mark of the program, the video concludes at the 48 minute mark - seen on the video.
The first jump is 19 seconds in, it jumps around a few more times from that point on - the total clip is 2:09 in length: