4200X Software 5.5 build 319 If you need the serial number I can PM it to you.
Basically, when watching a program with roVideoScreen and pressing some buttons, the channel crashes and the roku reboots itself. The problem occurs when the video has been paused for hours, then pressing rewind for a little bit and then play. It just kind of crashes out, never rebuffering, and a few moments later it's the reboot roku logo and back to the home screen.
I'll try to see if I can get a log of it when it happens.