software-center crashed with RuntimeError in on_window_main_delete_event(): called outside of a mainloop

Happened to me to, exactly the same: start software center, and while it's still loading some stuff, close it.

It affects me too, exactly the same: start software center, and while it's still loading some stuff, I close it.

This happened when I opened a .deb file from within archive manager.

Same description as #2 and #3.

It hapṕened after i upgrade the 11.04 to 11.10, i'm experiencing a lot of error since then.

This bug was fixed in the package software-center - 4.1.23.7

---------------
software-center (4.1.23.7) oneiric; urgency=low

  [ Gary Lasker ]
  * softwarecenter/backend/installbackend_impl/aptd.py:
    - fix UnicodeDecodeError in _show_transaction_failed_dialog
      (LP: #858193)
  * softwarecenter/backend/installbackend.py,
    softwarecenter/ui/gtk3/aptd_gtk3.py,
    softwarecenter/ui/gtk3/dialogs/__init__.py:
    - implement the error() method of InstallBackendUI to display the
      required error dialog in the event of a transaction error
      (LP: #860137)
  * softwarecenter/backend/installbackend_impl/aptd.py:
    - add unicode handling for the transaction error dialog
  * softwarecenter/utils.py:
    - let the utf8() method handle None as an input value
  * softwarecenter/ui/gtk3/views/appdetailsview_gtk.py:
    - fix UnicodeDecodeError in set_value() (LP: #846600)
  * softwarecenter/db/debfile.py:
    - fix UnicodeDecodeError in warning() (LP: #845298)
  * softwarecenter/ui/gtk3/app.py:
    - fix intermittent crash at shutdown (LP: #728973)
  * softwarecenter/ui/gtk3/panes/availablepane.py,
    softwarecenter/ui/gtk3/session/navhistory.py,
    softwarecenter/ui/gtk3/session/viewmanager.py:
    - navigate back to the application details view on
      a purchase cancellation or a purchase error (LP: #859790)
  * softwarecenter/ui/gtk3/panes/installedpane.py:
    - fix empty installed view after clearing search (LP: #860810)
    - fix rendering glitch when searching with OneConf
      active (LP: #860818)
  * softwarecenter/utils.py:
    - fix crash in save_person_to_config() (LP: #858403)
  * softwarecenter/ui/gtk3/widgets/reviews.py:
    - fix UnicodeDecodeError in _whom_when_markup()

  [ Michael Vogt ]
  * softwarecenter/ui/gtk3/widgets/searchentry.py:
    - merge header fix
  * softwarecenter/ui/gtk3/app.py, softwarecenter/utils.py:
    - add support for proxy setup from gsettings (LP: #742564)

  [ Juhana Jauhiainen ]
  * Added For Software developers link to Help menu. (LP #722366)

  [ Didier Roche ]
  * softwarecenter/ui/gtk3/panes/installedpane.py:
    - disable search when viewing oneconfviews

  [ Kiwinote ]
  * softwarecenter/ui/gtk3/panes/viewswitcher.py:
    - if we're in the 'in progress' view and all the transactions finish, then
      navigate back (LP: #831524)
 -- Michael Vogt <email address hidden> Wed, 28 Sep 2011 18:02:08 +0200

Not fixed in natty software-center 4.0.5.