aptd crashed with SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)

1) Description: Ubuntu oneiric (development branch)
         Release: 11.10
2) Installed: 0.43+bzr666-0ubuntu1
  Candidate: 0.43+bzr666-0ubuntu1
  Version table:
 *** 0.43+bzr666-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages
        100 /var/lib/dpkg/status

3) Load at Startup

4) Crashed on Login.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: aptdaemon 0.43+bzr666-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-8.11-generic 3.0.1
Uname: Linux 3.0.0-8-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Sat Aug 13 17:36:55 2011
ExecutablePath: /usr/sbin/aptd
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110803.1)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/sbin/aptd
ProcEnviron:

PythonArgs: ['/usr/sbin/aptd']
SourcePackage: aptdaemon
Title: aptd crashed with SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
Traceback: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
UpgradeStatus: Upgraded to oneiric on 2011-08-13 (1 days ago)
UserGroups: