Comment 18 for bug 229668

Did some testing.
Positive:
e.g. search network, synaptic and clicked on system monitor, synaptic manual

Positive:
search software, click on software center.

Negative:
search software, click on "use the command line", (marked the german sentence, in addition screenshot shows odd broken sub sentence)
On first click nothing happens, on second, yelp window closed.
The link behind "use command line":
file:///usr/share/gnome/help/basic-commands/de/basic-commands.xml#goscustdesk-53

Extracted yelp messages from xsession-errors.

$ dpkg -l yelp
ii yelp 2.30.0-0ubuntu2
$ uname -r
2.6.32-24-generic
$ lsb_release -d
Description: Ubuntu 10.04.1 LTS

Seems the issue may remain for some path, links or string (whatever you call it), but the question is which. Actually one could test hundreds of different search terms and click on each listing, which would take endless time, so it's rather a task for BlueGene or similar.