Well, I think the problem was UPnP.

I misread your post and ran MediaBox where I had no internet connection (although not in ofline mode), and all problems stopped. Brought it back online, and its still working fine! Sees my UPnP device (MediaTomb) fine too.

Strangely, though, I have never had problems with MediaBox with this UPnP server before, and have used them togeather sucessfully, and I havn't changed the server any.

MediaBox *still* doesn't display album art when browsing by album. It does display (most) of it when browing by artist, though. But I'm glad the major problem seems fixed. Hopefully the album art will work in a future release.

I can post output from MediaBox -vvv if you'd like, but nothing eventfull there, except some errors in the beginning of the output about a jpeg loader failing without error... its scrolled out of the window now and I can't see it, though.

Thanks for the suggestions and (MediaBox) pycage. I guess its working now!