Nothing and nobody will ever convince me that using that red button to reboot is a good thing. I have tried it on my 44 and had nothing but problems each time. I'd much rather pull the plug.
Rich
I've actually had more problems with menu restarts (and pulling the plug never helped) on the 44 I'm using when it's had problems. (It's a 500, though, if that makes any difference.)
I usually only use the menu for first restart after an update, then RBR 'cause I'm not patient enough to wait for the menu to come back and too lazy to reach down and pull the plug. Usually does the trick for guide-flushing.
No probs with reliability or anything using RBR.
I will, however, menu restart once and pull the plug as soon as the front panel goes dark (I think they call this a "graceful" restart) if I have to do any work with coax connections and such. This also seems to preserve the guide info so it doesn't have to be reloaded.
I've found that the older HR2x definitely benefit from plug-pulling, for what that's worth.
But to the topic, I'd make sure to do two restarts within a half-hour (by any method) to make sure the guide is flushed.