Support for slave backends

The setup:

--Ubuntu 12.04 32 bit, slave, and frontend
--Ubuntu 12.04 64 bit master backend
--MythTV 0.25+fixes (mythbuntu repository)
--XBMC from ubuntu unstable ppa
--PVR mythtv addon version 1.6.8

LiveTV does play, but stutters:
From a remote frontend, MythTV frontend connects to the master backend and plays the slave backend live tv feed with no problem. With XBMC the live tv feed becomes blocky and stutters, sometimes worse than others.

Recordings don't play (neither with slave on nor off)