Just experienced this with my HR34 as well. Watching NCIS (which was about 45 minutes in when I stared it) not one single problem during the playback and pause of the show. When it was over I was unable to get the remote to delete it, like it wasn't responding.
Now response from the unit itself is sporadic with about half the on device buttons working. With the remote I get partial button response with all the play/ff/rew etc all non responsive. In addition, the exit button works and the unit shows light flashes on the front panel to recognize I am pushing the exit button, but majority of remote commands do nothing.
Too many things recording right now to do a RBR.
Is the above my only resolution at this time?