I had this with pitivi installed using apt-get under Ubuntu 12.04. However, when I used pitivi 0.15.2 downloaded from sources checked out from pitivi.org, everything worked fine. So I suspect some packaging error.
I had this with pitivi installed using apt-get under Ubuntu 12.04. However, when I used pitivi 0.15.2 downloaded from sources checked out from pitivi.org, everything worked fine. So I suspect some packaging error.