hal-device-manager crashed with AttributeError in on_about_activate()

Binary package hint: hal

I am running Ubuntu from the LiveCD.

Steps to reproduce:
With no applications open, select System->Preferences->Hardware Information. On the Hardware Information window, select Help->About. About seven seconds later, a window titled "Application problem" will appear, stating "Sorry, Hardware Information closed unexpectedly".

Note:
Despite the error dialog claiming otherwise, Hardware Information did not close at all, and if I select "Close" to dismiss the error dialog, I can continue using the Hardware Information dialog as usual. Conversely, if I select "Restart Program" on the error dialog, another instance of the Device Manager window appears, so I then have two. I am able to reproduce this bug every time I try.

ProblemType: Crash
Architecture: amd64
Date: Fri Jun 29 05:19:03 2007
DistroRelease: Ubuntu 7.10
ExecutablePath: /usr/bin/hal-device-manager
InterpreterPath: /usr/bin/python2.5
Package: hal-device-manager 0.5.9-2ubuntu1
PackageArchitecture: all
ProcCmdline: python /usr/bin/hal-device-manager
ProcCwd: /home/ubuntu
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/hal-device-manager']
SourcePackage: hal
Traceback:
 Traceback (most recent call last):
   File "/usr/share/hal/device-manager/DeviceManager.py", line 38, in on_about_activate
     self.about.show()
 AttributeError: 'NoneType' object has no attribute 'show'
Uname: Linux ubuntu 2.6.22-6-generic #1 SMP Fri Jun 1 00:54:39 GMT 2007 x86_64 GNU/Linux