liferea fails to open selected feed to browser on first launch with a "Fatal: cannot retrieve browser command"

When launched for the first time, Liferea refuse to open the selected feeds into your browser and notifies it in the bottom left corner of the UI. This can be easily fixed by going to the preferences, in the browser section. The strange things is that even if you don't modify anything in the browser section, the "open in browser" is back working.

Steps to reproduce the bug:
1) install liferea for the first time
2) update current feeds
3) try opening one by double-click on the its entry, normally nothing happens and a message is displayed on the bottom left corner
4) go to Tools -> Preferences
5) navigate to "Browser"
6) exit the Preferences
7) try opening the feed again, now it should be working

Pretty sure I had the same behaviour on Debian Wheezy as well, so might be good to report upstream if the bug is confirmed.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: liferea 1.8.3-0.1ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-30.48-generic 3.2.27
Uname: Linux 3.2.0-30-generic x86_64
ApportVersion: 2.0.1-0ubuntu13
Architecture: amd64
Date: Tue Sep 18 22:09:43 2012
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120822.4)
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: liferea
UpgradeStatus: No upgrade log present (probably fresh install)