aptd crashed with AttributeError in _on_queue_changed(): 'AptDaemon' object has no attribute 'PropertyChanged'

[PC]

I was running 11.10 alpha3 desktop in live mode. I ran an update that started, seemed to download updates and was then configuring them when a message came up about a "problem" and would I like to report it. I said yes and this is the report. I don't understand the issue so I did not make it a duplicate of another bug report it found when filing this.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: aptdaemon 0.43+bzr663-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-7.9-generic 3.0.0
Uname: Linux 3.0.0-7-generic i686
Architecture: i386
CasperVersion: 1.277
Date: Sun Aug 7 08:10:03 2011
ExecutablePath: /usr/sbin/aptd
InterpreterPath: /usr/bin/python2.7
LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Alpha i386 (20110803.1)
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/sbin/aptd
ProcEnviron:

PythonArgs: ['/usr/sbin/aptd']
SourcePackage: aptdaemon
Title: aptd crashed with AttributeError in _on_queue_changed(): 'AptDaemon' object has no attribute 'PropertyChanged'
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/python2.7/dist-packages/aptdaemon/core.py", line 1287, in _on_queue_changed
     self.PropertyChanged("RebootRequired", self._reboot_required)
 AttributeError: 'AptDaemon' object has no attribute 'PropertyChanged'
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: