libclutter-gst-2.0-0 crashes using Python

[Dirk Meyer]

I just updated from Ubuntu 12.04 (clutter-gst-1.0-0 version 1.5.4-0ubuntu2 and gir1.2-clutter-gst-1.0 version 1.5.4-0ubuntu2) to
Ubuntu 12.10 (libclutter-gst-2.0-0 version 1.9.92-1 and gir1.2-clutter-gst-2.0 version 1.9.92-1) and Freevo crashes when playing video files.

I traced the bug and wrote a small example program (see attachment); use a video file as parameter. If libclutter-gst-2.0-0 is installed, it crashes with

(python:23263): GStreamer-CRITICAL **:
Trying to dispose element pipeline, but it is in READY instead of the NULL state.

If you store the result of media.get_pipeline in self it works (until self is deleted by garabage collection which will not happen in the small sample). It looks like a reference counting problem to me. If I delete libclutter-gst-2.0-0 and install libclutter-gst-1.0-0 it works fine.