I'm happy to say as promised, 1.4.3-1 has been finished.

A couple of notes before you download and install:

1) i686 and x86_64 were fully tested on clean F12 installs and worked without
any issues, so I am satisfied. However, I spent hours trying to debug an
"audiosink" issue on my x86_64 install and it turned out to be a leftover
config from when I was running F11 and my X-Fi sound card, which was not
supported properly and not using autoaudiosink. The point is, songbird is very
sensitive to which audio engine you are using. If you have playback issues on a
system that has been upgraded F10->F11->F12, etc, most likely that is your
problem and you're not running the same way as a fresh F12 install

Example: Something along these lines...
https://bugs.launchpad.net/ubuntu/+source/rhythmbox/+bug/442157

2) I do not have a PPC/PPC64 system any more, so the builds are untested. They
completed successfully, but I can't verify functionality.

3) I recommend using the absolute latest gstreamer and gstreamer-plugins
available in the repo, Songbird constantly upstreams patches. Old gstreamer
versions can lead to playback issues. As always, mp3 support is through the
full suite of gstreamer-plugins not available or licensed from Fedora.

4) To take the load off the devs, when reporting bugs back to Songbird please
try their binary blob to verify the bug on your system first if you're not sure
whether it's a problem with this package or a core player problem. I've seen
lots of people reporting "my F11 rpm doesn't work in F12". That's not their
problem if their website's release does in fact work, that's my problem. Just a
heads up to keep this in mind.
 
All Fedora 12 Songbird RPM's can be found on the Songbird Contributed Builds page.