Just for kicks, here is the code when the graphical interface is used

2008-04-26 17:27:04,781 INFO release-upgrader version '0.87.24' started
2008-04-26 17:27:05,164 DEBUG Using 'DistUpgradeViewGtk' view
2008-04-26 17:27:05,210 DEBUG enable dpkg --force-overwrite
2008-04-26 17:27:05,276 DEBUG lsb-release: 'gutsy'
2008-04-26 17:27:05,276 DEBUG _pythonSymlinkCheck run
From there it just hangs.