Description of problem:
yelp crashes when trying to search

Version-Release number of selected component (if applicable):
[maxx@ice ~]$ rpm -q yelp beagle libbeagle
yelp-2.13.6-1
beagle-0.2.2-3
libbeagle-0.2.2-3


How reproducible:
Always

Steps to Reproduce:
1. Open yelp
2. Enter something in the search box and hit return
3. Crash
  
The following appears in the terminal:

(yelp:3614): GLib-GObject-WARNING **: invalid uninstantiatable type `(null)' in
cast to `BeagleRequest'

(yelp:3614): GLib-GObject-WARNING **: instance of invalid non-instantiatable
type `(null)'