[mythtv-users] sudden change in recording start-up time

[malcolm]

This is a tricky one, I thought I had my Mythtv system licked with the 
recent update to Mythbuntu 10.04 but...

Problem Statement:
Starting live tv or any recording on the frontend an it buffers for 63s 
or so. Its only just started to do this recently after being fine for 
weeks since I installed 10.04.

Hardware Set-up:
I have an master backend/frontend recording terrestrial TV which works 
great, this serves recordings to itself, a remote frontend in the lounge 
and to a PS3 via mythtv mediaserver.
Backend is an AMD 3GHz PC with 1GB RAM
The frontend is dual core with 4GB RAM
Both master and remote systems run Mythbuntu 10.04.
My network is Base 1000.

Investigation / Diagnostics to date:
Playback of recordings on the PS3 via mediaserver buffers for 2-3s 
before playing.
Start-up on the master frontend or recording or live TV is typically 3-4s.
Videos shared from a separate media server (QNAP box) buffer and play 
after 1-2s on both the all frontends and the PS3.
The backend doesn't report any significant increase in load when serving 
recordings.

I'm assuming I've broken something in the set-up / config of the remote 
frontend and have somehow 'asked' the system to buffer for an extra 60s. 
I have no recollection of changing anything but the sharp decline in WAF 
means I need to resort to your expert help.

My fallback is to completely rebuild the remote frontend but without 
knowing what I've done wrong, I'm not convinced its the best action.

any ideas?