Kazams 0.90 released in the unstable-serie. Few modifications to PulseAudio support and a complete port to Gtk3. This version will not work with Gtk2 and there will be no backporting to older Ubuntu releases. Currently only Oneiric Ocelot 11.10 and Precise Pangolin 12.04 are supported.
Bugs addressed and fixes commited to: #896806, #661767, #656864, #662374, #635921, #732166, #739171, #908768, #660673, #660687.
If you had Kazam previously installed from unstable series PPA it will be upgraded automatically. If you are trying new installation, then you’ll find more detailed instructions here.
UPDATE: Kazam 0.91 was released, read more about it.