Cinnamon + Pulseaudio + Jack issue

Hello guys,

I had a functional debian sid system including those three with the pulseaudio-module-jack package bridging between PA and Jack. Unfortunately, since my last aptitude upgrade, this combo no longer works, and I'm suspecting a cinnamon issue.
After I start jack through Qjackctl and kill/start pulseaudio, I used to see the jack sink and jack source ios in cinnamon's sound settings. Now it no longer happens and I get no sound.
But, if I launch pavucontrol, I do see both of those, and fiddling with the volume bar on the jack sink produces sound. To further make sure that it's a cinnamon only issue, I installed both KDE and Gnome and gave them a try : works as expected.

Any ideas?