pycentral crashed with AttributeError in prepare()

Binary package hint: python-central

I upgraded to Hardy and since then this is what I get. The update-manager seems to be broken and cannot be fixed through apt-get -f install or through synaptic. Either way this is the information published to me.

apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
  libwvstreams4.3-extras libfaad2-0 libmtp6 libgoffice-0-common libneon26
  libgksu1.2-1 python-at-spi libsnmp10 libgksuui1.0-1 libbeagle0 libglew1.4
  libmp4v2-0 refblas3 libcamel1.2-10 libsuperlu3 libsoup2.2-8 libgpod2
  libcdio6 libsvg1 libx264-54 libgutenprintui2-1
  linux-headers-2.6.22-14-generic gutsy-wallpapers cinepaint-data libbrlapi1
  libgoffice-0-4 libwvstreams4.3-base libpt-plugins-alsa liboobs-1-3 libdb4.5
  pitivi linux-headers-2.6.22-14 libtotem-plparser7 libuniconf4.3
  libcinepaint0 gstreamer0.10-gnonlin linux-source-2.6.22 libnss3-0d
  libkdcraw1 feisty-gdm-themes libpisync0
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  update-manager
The following packages will be upgraded:
  update-manager
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/895kB of archives.
After this operation, 57.3kB of additional disk space will be used.
Do you want to continue [Y/n]? Y
(Reading database ... 175317 files and directories currently installed.)
Preparing to replace update-manager 1:0.81.2 (using .../update-manager_1%3a0.87.9_all.deb) ...
Traceback (most recent call last):
  File "/usr/bin/pycentral", line 1674, in <module>
    main()
  File "/usr/bin/pycentral", line 1668, in main
    rv = action.run(global_options)
  File "/usr/bin/pycentral", line 1169, in run
    pkg.prepare(used_runtimes, old_used_runtimes, old_pkg)
  File "/usr/bin/pycentral", line 803, in prepare
    rt.remove_byte_code(removed_fs)
AttributeError: 'NoneType' object has no attribute 'remove_byte_code'
dpkg: error processing /var/cache/apt/archives/update-manager_1%3a0.87.9_all.deb (--unpack):
 subprocess pre-installation script returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/update-manager_1%3a0.87.9_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=8.04
DISTRIB_CODENAME=hardy
DISTRIB_DESCRIPTION="Ubuntu hardy (development branch)"

Does anyone have a clue how to fix this?

ProblemType: Crash
Architecture: i386
Date: Wed Feb 27 20:44:11 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/bin/pycentral
InterpreterPath: /usr/bin/python2.5
NonfreeKernelModules: nvidia
Package: python-central 0.5.60ubuntu4
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/pycentral pkgprepare update-manager
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/pycentral', 'pkgprepare', 'update-manager']
SourcePackage: python-central
Title: pycentral crashed with AttributeError in prepare()
Uname: Linux 2.6.24-10-386 i686
UserGroups: