Not good for you but finally I am glad that I am not the only one that has been hit by the blank screen recordings.
I've only had it happen twice but the not authorised to this channel during trying to watch just normal live tv is making me potty. It's getting to the point where the wife is now saying why did we get a HD tv and a supposed HD box when I try to go to the the HD channels they don't work until a reboot and 80% of the time I am recording something elsewhere so can't reboot at that time.
This is a bigger issue for me than any red button, reminder missing or global padding. You should be able to switch to a channel and it be there to watch without having to do a reboot to fix it!