Latest stable version of Lifeograph is 0.11.1 (Released: 2013/02/06). Users of previous versions recommended to upgrade to this one if they have Gtk+ 3 on their systems. This is a maintenance release that (w.r.t 0.11.0) only fixes bugs, extends the manual and updates the translations.
For Gtk+ 2 only users, last usable version is 0.8.2 (Released: 2012/05/10):
Ubuntu users can add Lifeograph PPA at Launchpad to their repositories list: