Yelp cannot find man page anymore

Before migrating to Ubuntu Precise LTS, I was running Ubuntu Maverick. On Ubuntu Maverick, typing the name of a command which was given a man page, opened than manpage. On Ubuntu Precise, it does not work any more.

The same if in the search field, I type `man:<command>`.

Finally, Yelp is able to find the man page only if it was requested to from a command line, like in `yelp man:<command>`.

I using Yelp a lot on Ubuntu Maverick, and I'm not using it any more on Ubuntu Precise, due to that it may tell you a documentation on a topic does not exist, while it exists.

I also sometime get errors about XML or XSLT, don't remember, but that will be for another but report.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: yelp 3.4.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-37.58-generic-pae 3.2.35
Uname: Linux 3.2.0-37-generic-pae i686
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: i386
CheckboxSubmission: 9b39dc487a858b4cfa15c3a2f5fa50d5
CheckboxSystem: d00f84de8a555815fa1c4660280da308
Date: Tue Feb 19 06:40:16 2013
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: yelp
UpgradeStatus: No upgrade log present (probably fresh install)