crash in controler.doPartialUpgrade()

[hobofood]

Running update-manager in Jaunty beta, it informs me that not all packages can be installed and offers to do a partial upgrade. Clicking "Partial Upgrade" goes through downloading the packages but then when it comes to "Installing the upgrades" them it silently exits.

The packages it wants to install/remove/upgrade are:
Remove libopal3.4.2
Install flashplugin-installer
Install libinficate1
Install liblrdf0
Install libopal3.6.1
Install libpt2.6.1
Install libpt2.6.1-plugins-alsa
Install libpt2.6.1-plugins-v412
Upgrade ekiga
Upgrade evolution-indicator
Upgrade flashplugin-nonfree
Upgrade gstreamer0.10-plugins-bad
Upgrade indicator-applet
Upgrade indicator-messages
Upgrade pidgin-libnotify

Terminal output is:
hobofood@hobofood-desktop:~$ update-manager
/home/hobofood/.themes/Dust Cold/gtk-2.0/gtkrc:708: Murrine configuration option "highlight_ratio" will be deprecated in future releases. Please use "highlight_shade" instead.
/home/hobofood/.themes/Dust Cold/gtk-2.0/gtkrc:709: Murrine configuration option "lightborder_ratio" will be deprecated in future releases. Please use "lightborder_shade" instead.
/home/hobofood/.themes/Dust Cold/gtk-2.0/gtkrc:708: Murrine configuration option "highlight_ratio" will be deprecated in future releases. Please use "highlight_shade" instead.
/home/hobofood/.themes/Dust Cold/gtk-2.0/gtkrc:709: Murrine configuration option "lightborder_ratio" will be deprecated in future releases. Please use "lightborder_shade" instead.
ERROR:root:not handled expection:
Traceback (most recent call last):

  File "/usr/bin/update-manager", line 100, in <module>
    controler.doPartialUpgrade()

  File "/usr/lib/python2.6/dist-packages/DistUpgrade/DistUpgradeController.py", line 1595, in doPartialUpgrade
    if not self.doDistUpgrade():

  File "/usr/lib/python2.6/dist-packages/DistUpgrade/DistUpgradeController.py", line 972, in doDistUpgrade
    self.quirks.run("StartUpgrade")

  File "/usr/lib/python2.6/dist-packages/DistUpgrade/DistUpgradeQuirks.py", line 77, in run
    for plugin in self.plugin_manager.get_plugins(condition):

  File "/usr/lib/python2.6/dist-packages/computerjanitor/plugin.py", line 167, in get_plugins
    filenames = self.get_plugin_files()

  File "/usr/lib/python2.6/dist-packages/computerjanitor/plugin.py", line 120, in get_plugin_files
    basenames = [x for x in os.listdir(dirname)

OSError: [Errno 2] No such file or directory: './plugins'

ERROR:root:failed to import apport python module, can't report bug: No module named python_hook
none
hobofood@hobofood-desktop:~$

[hobofood (lawrence-anstey)]

Should have mentioned: ubuntu jaunty amd64 upgraded from Intrepid on the day the beta was released, i have run sudo apt-get update/upgrade a few times since then and except for the aforementioned packages, I am up to date.