abrt 1.1.1 detected a crash.

architecture: x86_64
cmdline: python /usr/share/system-config-printer/system-config-printer.py
component: system-config-printer
executable: /usr/share/system-config-printer/system-config-printer.py
kernel: 2.6.33.6-147.fc13.x86_64
package: system-config-printer-1.2.3-3.fc13
reason: system-config-printer.py:3012:on_quit_activate:AttributeError: GUI instance has no attribute 'mainlist'
release: Fedora release 13 (Goddard)

backtrace
-----
system-config-printer.py:3012:on_quit_activate:AttributeError: GUI instance has no attribute 'mainlist'

Traceback (most recent call last):
  File "/usr/share/system-config-printer/system-config-printer.py", line 3012, in on_quit_activate
    del self.mainlist
AttributeError: GUI instance has no attribute 'mainlist'

Local variables in innermost frame:
widget: <gtk.Window object at 0x2675870 (GtkWindow at 0x27531c0)>
event: <gtk.gdk.Event at 0x2b7f418: GDK_DELETE>
self: <__main__.GUI instance at 0x2670290>

How to reproduce
-----
1.ABra o programa tente instalar uma impressora
2.
3.