Comment 0 for bug 951238

1) double-clicked on a DEB file, so Ubuntu Software Center window (with "waiting/refreshing" animation at the center) opened;
2) Help -> About, Close;
3) View -> Canonical-Maintained Software;
4) still "waiting/refreshing", so i closed the window, but it crashed.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: software-center 5.1.11
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94.1-0ubuntu1
Architecture: amd64
Date: Sat Mar 10 01:40:47 2012
ExecutablePath: /usr/share/software-center/software-center
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/software-center /home/username/apps/aircrack-ng/aircrack-ng/aircrack-ng_1.1~svn2127-1_amd64.deb
PythonArgs: ['/usr/bin/software-center', '/home/username/apps/aircrack-ng/aircrack-ng/aircrack-ng_1.1~svn2127-1_amd64.deb']
SourcePackage: software-center
Title: software-center crashed with AttributeError in refresh_apps(): 'NoneType' object has no attribute 'clear_model'
UpgradeStatus: Upgraded to precise on 2012-03-07 (2 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse kismet kvm lpadmin netdev plugdev powerdev sambashare scanner tape vboxusers video wireshark