They are, but AIUI BBC1 uses a fixed bandwidth whereas the others are use
statmux (I think that's the term).
BBC1 is fixed in order that regional variations in programming can be
broadcast, whereas the others are identical across the country and a channel
momentarily requiring more bandwith than the others can be given it at the
expense of the bandwidth of the others.
I can't see how this might affect the lock, but it's possible I guess.
Very good pointer. Assuming statmux applies to Channel 4 and some of the
Travel / Shopping channels this would explain the sporadic problems with
those as well. Is statmux something that is only used for DVB-T and not
commonly used for DVB-s? Maybe if the bitrate changes while it's trying to
feed the first couple of seconds it dies. Strange then why 0.9.4 works so
well. However even with that driver Channel 4 shows the behaviour from time
to time. Maybe we should really have a look at the new PCR stuff, as this
seems to come up in threads related to statistical multiplexing. Someone in
the UK has worked out the values I believe? Would be nice if could have
those posted to the list.