This thread sets out the issues associated with supporting UPnP and DLNA.
Brian’s conclusion was:
So on the whole, even if we expended the technical effort, I have my doubts that we could ever get to a place where we confidently say “We support UPnP” and our users can confidently buy UPnP stuff and know that it will work. And lots and lots of time will go down to toilet getting from where we are to that (disappointing) final outcome.
I never say never…but I don’t want to push out bad product, or product we can’t support well. And I haven’t seen a way around these issues yet.
There is a feature request thread here, but the prospects of the issues referred to by Brian being resolved seem slim.