Hey guys, wanted to follow up on this.
I have a ubuntu 10.04 box and installed mythtv the easy way (apt-get install mythtv). It set up the upnp server by default and i copied a few sample files into my videos directory and was able to play them. So we work ok with the core server at least.
It looks like it installed 0.23 for me
I didn't try with recordings, as i don't have a tuner or a method of making recordings at all. So i'm guessing it is something specific to how myth presents the recording info to us - it probably constructs the metadata from the database.
Just to check, this fails for everyone when they click on the recording, and before it opens the dialog offering to let you play?
Will keep on working at it.
dan conti, boxee engineer