What if you try to launch the widget form the commandline? Code: python2.5 /usr/lib/hildon-desktop/shutter.py Helps in debugging, as it shows in the commandline if something is missing and what the app did (or tried to do :-)
python2.5 /usr/lib/hildon-desktop/shutter.py
CTraceback (most recent call last): File: "/usr/lib/hildon-desktop/shutter.py", line 117, in <module> gtk.main() KeyboardInterrupt