I'm now using VDR 1.3.39-1 (Darren Salt's deb) and vdradmin-am-3.4.3rc with DVB-T in the UK (Freeview). I've still got the same annoying problem with vdradmin's channel configuration that I've had for ages. Generally, when I try to add channels to the menus in vdradmin's Configuration page, they won't appear, seemingly at random. Later on some of them do; I think this may be caused by VDR doing an EPG scan.
When I raised this complaint once before, one of the authors commented something about, "Perhaps we shouldn't filter out channels [something or other]". So I had a look at the code and saw that it was skipping channels without EPG data. I removed that check, but it didn't help much because it wouldn't show any data for those channels.
Now that I've got softdevice running again instead of running VDR as a recording daemon with no output, I just did an experiment. In VDR I viewed the schedule for one of the channels vdradmin refused to display. When I looked again in vdradmin that channel had become available.