For Purchase entry is displayed as "Unknown" in the toolbar menu

This bug was fixed in the package software-center - 5.1.5

---------------
software-center (5.1.5) precise; urgency=low

  [ Kiwinote ]
  * softwarecenter/ui/gtk3/models/appstore2.py:
    - fix TypeError in load_range (LP: #911886)
  * softwarecenter/ui/gtk3/panes/historypane.py:
    - change COL_PKG to an object rather than a str (LP: #905762)
  * softwarecenter/ui/gtk3/panes/installedpane.py:
    - fix utf8 oddness to make remote installed panes work
  * softwarecenter/ui/gtk3/widgets/oneconfviews.py:
    - ensure that hostid is always a string (as we declared) (LP: #905605)
  * softwarecenter/ui/gtk3/widgets/thumbnail.py:
    - fix IndexError in set_thumbnails_from_data (LP: #888669)
  * grab exhibits for the current series only (LP: #899257)

  [ Michael Vogt ]
  * Remove explicit GObject.threads_init as initializing the threads
    explicitely causes a segfault on close but nothing more
    (LP: #907568)
  * lp:~mvo/software-center/startup-speed2:
    - improve the startup speed by moving out the (expensive) channel
      change test out of the main app into a spawned helper, also
      delays some computations and adds a cheaper way for getting the
      appcount
  * lp:~mvo/software-center/icon-data:
    - remove the need for inline icon data from the agent, instead
      download icons directly using the provided URL
  * softwarecenter/db/debfile.py:
    - fix encoding error for some debs (based on
      lp:~roignac/software-center/bug-738771-summary-unicode), thanks
      to Vadim Rutkovsky, LP: #738771
  * softwarecenter/ui/gtk3/views/appdetailsview.py:
    - fix crash in test/gtk3/test_views.py
  * lp:~mvo/software-center/replace-restfulclient-with-piston:
    - replace lazr.restfulclient with piston-mini-client for ubuntu-sso
      and cleanup the piston-mini-client helper code

  [ Gary Lasker ]
  * softwarecenter/backend/channel_impl/aptchannels.py:
    - display the correct label text for the For Purchase menu item
      in the toolbar (LP: #911964)
  * lp:~gary-lasker/software-center/date-published-cleanup:
    - remove no longer needed code
  * lp:~gary-lasker/software-center/replace-restfulclient-with-piston-tweaks:
    - tweaks and fixes the branch

  [ Vadim Rutkovsky ]
  * lp:~roignac/software-center/bug-632773-selectable-title:
    - make the app title selectable (LP: #632773)
 -- Michael Vogt <email address hidden> Fri, 06 Jan 2012 10:56:48 +0100