That apt output looks as though you've instructed apt to install libpulse-dev from jessie, but you already have libpulse0 etc. from jessie-backports, which are incompatible with libpulse-dev from jessie.
Thanks, this seems to be the culprit. I thought I had set priorities but I commented out the jessie-backports one at some point in time between updating PulseAudio and now. Sorry for wasting your time with my noobness. -Albert