Maybe time to add that to the FAQ?

It's in there, in the section about upgrading the software:

    Sometimes you will need to leave the player's power cable unplugged until you are prompted on the screen (by the upgrade software) to apply power. In most cases, this is not needed because the upgrader will try to reboot the player automatically. But sometimes it's still necessary. This "worst case scenario" is hard-coded into the player's protected flash so that you can still upgrade the player even if the installed software is totally hosed.
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Tony Fabris