apt-listchanges crashed with AttributeError in __init__()

Binary package hint: apt-listchanges

I just tried this utility and it crashed:
-----------------------------------
$ apt-listchanges plymouth
dpkg-deb: failed to read archive `plymouth': No such file or directory
Traceback (most recent call last):
  File "/usr/bin/apt-listchanges", line 229, in <module>
    main()
  File "/usr/bin/apt-listchanges", line 102, in main
    pkg = DebianFiles.Package(deb)
  File "/usr/share/apt-listchanges/DebianFiles.py", line 109, in __init__
    self.binary = pkgdata.Package
AttributeError: ControlStanza instance has no attribute 'Package'

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: apt-listchanges 2.84
ProcVersionSignature: Ubuntu 2.6.32-18.27-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-18-generic x86_64
Architecture: amd64
CheckboxSubmission: ca8cd8511cd050bd957f6b0d37298435
CheckboxSystem: 5202e7ee197af4942baf4f50cf4120c6
Date: Thu Apr 1 22:13:56 2010
ExecutablePath: /usr/bin/apt-listchanges
InterpreterPath: /usr/bin/python2.6
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/apt-listchanges plymouth
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.UTF-8
PythonArgs: ['/usr/bin/apt-listchanges', 'plymouth']
SourcePackage: apt-listchanges
Title: apt-listchanges crashed with AttributeError in __init__()
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