gahpor does not start

Binary package hint: gaphor

Hi there!

I wonder why gaphor does not start. So I tried this on the gnome-terminal:

martin@martin-laptop:~$ gaphor

** (gaphor:20997): WARNING **: couldn't make the type `CanvasGroup' ready
TypeError: Cannot create a consistent method resolution
order (MRO) for bases GObject, CanvasGroupableIface, CanvasGroupable
Segmentation fault (core dumped)
martin@martin-laptop:~$

Hum, I don't know what happend.

Additional information:

martin@martin-laptop:~$ apt-cache show gaphor
Package: gaphor
Priority: optional
Section: universe/devel
Installed-Size: 1436
Maintainer: Ubuntu MOTU Developers <email address hidden>
Original-Maintainer: Cédric Delfosse <email address hidden>
Architecture: all
Version: 0.8.1-5.1ubuntu1
Depends: python, python-support (>= 0.2), python-diacanvas2 (>= 0.14.4-3), python-gnome2, gaphor-lib (= 0.8.1-5.1ubuntu1) | zope3
Filename: pool/universe/g/gaphor/gaphor_0.8.1-5.1ubuntu1_all.deb
Size: 223958
MD5sum: 877286ca72cd05f10a4c7d91d9866ade
SHA1: 36f0df768822a179815f8e4813cfef63d42e8b57
SHA256: 43e4369921440fa4f8e1185206f2df6deee9d5f64ba5ec422cdd8d4020e46cf3
Description: UML modeling tool
 This program is an easy to use UML (Unified Modeling Language) modeling
 environment. It allows you to create UML diagrams for documentation and to
 assist you with design decisions.
Bugs: mailto:<email address hidden>
Origin: Ubuntu

martin@martin-laptop:~$ uname -a
Linux martin-laptop 2.6.20-15-386 #2 Sun Apr 15 07:34:00 UTC 2007 i686 GNU/Linux

Thanks for your help.