pycentral crashed with AttributeError in prepare()

[tiburcio]

Ubuntu Hardy alpha 5

HP laptop amd64

Crash when trying update (update-manager) "onboard version 0.91"

~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
  onboard
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/34.9kB of archives.
After this operation, 98.3kB of additional disk space will be used.
Do you want to continue [Y/n]? y
(Reading database ... 220616 files and directories currently installed.)
Preparing to replace onboard 0.87 (using .../archives/onboard_0.91_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 793, in prepare
    self.default_runtime.remove_byte_code(removed_fs)
AttributeError: 'NoneType' object has no attribute 'remove_byte_code'
dpkg: error processing /var/cache/apt/archives/onboard_0.91_all.deb (--unpack):
 subprocess pre-installation script returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/onboard_0.91_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Crash
Architecture: amd64
Date: Thu Feb 28 06:02:54 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 onboard
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/X11R6/bin
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/pycentral', 'pkgprepare', 'onboard']
SourcePackage: python-central
Title: pycentral crashed with AttributeError in prepare()
Uname: Linux 2.6.24-10-generic x86_64
UserGroups: vboxusers