gdebi: could not show link: operation not supported

I can confirm this bug.

Actually I can also confirm that the link doesn't work on Karmic too. The only difference is that instead of logging the error through a window, on Karmic it logs it to the console:

$ gdebi-gtk
/usr/lib/python2.6/dist-packages/GDebi/GDebi.py:371: GtkWarning: Unable to show 'www.ubuntu.com': Operation not supported
  self.dialog_about.run()

After closer inspection, the problem is that the link in the GtkAboutDialog is given as "www.ubuntu.com" and not "http://www.ubuntu.com". Attached is a trivial patch to fix this.

This bug was fixed in the package gdebi - 0.6.1

---------------
gdebi (0.6.1) unstable; urgency=low

  [ Luca Falavigna ]
  * GDebi/DebPackage.py:
    - Correctly parse strictly earlier version of conflicting packages
      to allow installation of packages conflicting with a version lower
      than the one being installed (LP: #484097).
    - Replace imports of deprecated debian_bundle with debian.
  * GDebi/DebPackage.py:
    - Fix typo in format string, thanks Simon Ruggier (Closes: #577851).
  * GDebi/GDebiKDE.py:
    - Use kdesu instead of kdesudo (Closes: #584860).
  * debian/control:
    - Depend on python-debian >= 0.1.15.

  [ Michael Vogt ]
  * use --auto-deconfigure when runnign dpkg to correctly handle C/R.
  * po/es.po:
    - updated, thanks to Omar Campagne (closes: #578612).
  * do not use the VteReaper anymore, use the child-exited and
    get_child_exit_status() functions of VteTerminal for this
    (closes: #574168).
  * make link in about page clickable and point to launchpad.net
    project page (LP: #562729), thanks to Gabe Gorelick.
  * port to python-apt 0.8 API (closes: #571763).
 -- Bhavani Shankar <email address hidden> Thu, 24 Jun 2010 21:34:30 +0200

Fixed in 0.6.1