As for the version thing, I am _very_ newbie to linux, and am running ubuntu. Whichever version I have was the only version I could find with a .deb package. If anyone has the time or inclination to explain how to automate updates to nightly builds, please do so.
http://nightlies.mt-daapd.org. You’ll find .debs for nightlies there. You’ll want to remove your existing package, delete the config file and install the new package. Then edit the config file to taste.
Do make sure you delete the existing config file. The config file formats have changed, and you’ll want to have your config file in the new format.