'You need to install this app before you can review it' label is duplicated for uninstalled apps without reviews

Confirmed in Ubuntu 11.04 and 11.10.

Many thanks for your fix, Robert! Now merged to trunk.

This bug was fixed in the package software-center - 4.1.22

---------------
software-center (4.1.22) oneiric; urgency=low

  [ Gary Lasker ]
  * data/ubuntu-software-center.desktop.in,
    debian/rules,
    setup.py,
    software-center,
    software-center-gtk2,
    softwarecenter/toolkit.py:
    - launch the new UI using 'software-center', add script
      to launch the old version if feeling nostalgic (LP: #839257)
  * softwarecenter/ui/gtk3/views/appdetailsview_gtk.py:
    - fix incorrect ellipsize for title and summary in the
      details view (LP: #842271)
  * softwarecenter/ui/gtk3/panes/availablepane.py,
    softwarecenter/ui/gtk3/session/viewmanager.py:
    - hide the search field when in the purchase
      view (LP: #844883)
  * softwarecenter/ui/gtk3/views/catview_gtk.py:
    - don't create the what's new panel if we don't have the
      corresponding category (LP: #835129)
  * softwarecenter/ui/gtk3/panes/installedpane.py:
    - fix crash in rebuild_categorised_view while viewing
      installed items (LP: #834260)
  * test/gtk3/test_catview.py,
    test/gtk3/test_panes.py,
    test/test_addons.py,
    test/test_package_info.py:
    - fix unit tests
  * setup.py:
    - fix build error when merging authors list
  * merged lp:~gary-lasker/software-center/pyflakes-fixes, no
    user visible changes, only code cleanup
  * po/software-center.pot:
    - refresh .pot file

  [ Matthew McGowan ]
  * data/ui/gtk3/css/softwarecenter.css,
    softwarecenter/ui/gtk3/views/appdetailsview_gtk.py:
    - fix grey addon label, only pkgname should be grey
      (LP: #838607)
  * softwarecenter/ui/gtk3/widgets/description.py,
    softwarecenter/utils.py,
    test/test_description_norm.py:
    - description formatting improvements, update unit test
  * data/ui/gtk3/css/softwarecenter.css,
    softwarecenter/ui/gtk3/widgets/cellrenderers.py:
    - use css to set border-radius of cellrenderer button
  * softwarecenter/ui/gtk3/views/appview.py:
    - disable appcount display at the bottom of list views
      for now to allow keyboard scrolling to work (LP: #830258)
  * lp:~mmcg069/software-center/lobby-tweaks:
    - restore tile borders but disable the checkerboard
      rendering, color tweaks and other improvements to the
      title area visuals
  * merge lp:~mmcg069/software-center/image-data-cleanup:
    - cleanup unused image files (LP: #839736)
  * softwarecenter/ui/gtk3/panes/softwarepane.py:
    - fix doubled search results (LP: #840235)
  * softwarecenter/ui/gtk3/app.py:
    - fix "Copy Web Link" feature (LP: #830291)

  [ Andrea Cimitan ]
  * softwarecenter/ui/gtk3/widgets/symbolic_icons.py:
    - Fix blurriness of toolbar icons, reduce shadow alpha level

  [ Gabor Kelemen ]
  * po/POTFILES.in:
    - additional i18n fixes (LP: #836346)

  [ Kiwinote ]
  * remove the old webkit ui
  * remove the need for dummy-screenshot-ubuntu.png (LP: #837223)
  * data/ui/gtk3/SoftwareCenter.ui,
    softwarecenter/ui/gtk3/app.py:
    - make all the accelerators work again (LP: #640426, LP: #660050,
      LP: #828233, LP: #830238, LP: #834988, LP: #843682)
      also fixes (LP: #823094, LP: #837062)
  * softwarecenter/db/appfilter.py,
    softwarecenter/ui/...