[mythtv] Tuner in use lockup

[David Griffith]

Hi all,
I've a bttv analog card and a DVB-T card in my setup. I've noticed a 
couple of times now that when one of my tuners is in use, switching to 
it (while I'm watching live tv) causes the frontend to time out. I'm 
sure this used to come up with a message along the lines of "that tuner 
is in use" - didn't it? Hmmm - maybe that was when I used to just have 
the one tuner.

Things seem to get out of sync at the frontend  - I get a lot of remote 
encoder timeouts, bad socket errors and a blank uninterruptible screen 
on the frontend when this occurs now.There's nothing in the backend log 
to suggest that anything's gone wrong.

Ideas?
Dave