There is a typo in the spec for gnome-python2-bonobo in versions 2.6.0-3 (FC3) and 2.10.0-1 (FC4) and possibly other versions too. The requires "pyorbit >= 2.0.l" (last char letter ell) should be "pyorbit >= 2.0.1" (last char digit one).
We will fix this the next time we have a security issue for gnome-python2. Thanks for bringing this to our attention.
This has been fixed in CVS so any future update will get this change.