After a most recent dist-upgrade of karmic, syncdaemon is constantly crashing/erroring

So, with the latest and greatest, it is now spawning up syncdaemon processes which crash infinitively, until the computer becomes unresponsive and dies a horrible death.
The current workaround is to kill the applet before it kills you.

I reported this behavior earlier in this bug:

https://bugs.edge.launchpad.net/ubuntu/+source/ubuntuone-client/+bug/405688

Although I'm not marking it as a duplicate, since I don't know that the same underlying crash is triggering the endless respawning for everyone.

And in fact it isn't, from reading the traceback above. So we have at least 3 bugs: the two different underlying crashes in syncdaemon, and the behavior that syncdaemon is endlessly respawned even when it is destined to fail.

Architecture: i386
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: nvidia
Package: ubuntuone-client 0.93.0-0ubuntu1
PackageArchitecture: all
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-7.27-generic-pae
Uname: Linux 2.6.31-7-generic-pae i686
UserGroups: adm admin cdrom couchdb dialout libvirtd lpadmin plugdev sambashare

^Cemurphy@detox:~$ /usr/lib/ubuntuone-client/ubuntuone-syncdaemon --debug
2009-08-27 08:28:09,290 - ubuntuone.SyncDaemon.VM - DEBUG - upgrading from metadata 3 (new layout)
2009-08-27 08:28:09,620 - ubuntuone.SyncDaemon - ERROR - Unexpected error
Traceback (most recent call last):
  File "/usr/lib/ubuntuone-client/ubuntuone-syncdaemon", line 192, in <module>
    main(sys.argv)
  File "/usr/lib/ubuntuone-client/ubuntuone-syncdaemon", line 145, in main
    shares_symlink_name='Shared With Me')
  File "/usr/lib/python2.6/dist-packages/ubuntuone/syncdaemon/main.py", line 96, in __init__
    self.vm = volume_manager.VolumeManager(self)
  File "/usr/lib/python2.6/dist-packages/ubuntuone/syncdaemon/volume_manager.py", line 125, in __init__
    upgrade_method(md_version)
  File "/usr/lib/python2.6/dist-packages/ubuntuone/syncdaemon/volume_manager.py", line 558, in _upgrade_metadata_3
    share.path = share.path.replace(old_root_dir, self.m.root_dir)
AttributeError: 'NoneType' object has no attribute 'replace'
Traceback (most recent call last):
  File "/usr/lib/ubuntuone-client/ubuntuone-syncdaemon", line 192, in <module>
    main(sys.argv)
  File "/usr/lib/ubuntuone-client/ubuntuone-syncdaemon", line 145, in main
    shares_symlink_name='Shared With Me')
  File "/usr/lib/python2.6/dist-packages/ubuntuone/syncdaemon/main.py", line 96, in __init__
    self.vm = volume_manager.VolumeManager(self)
  File "/usr/lib/python2.6/dist-packages/ubuntuone/syncdaemon/volume_manager.py", line 125, in __init__
    upgrade_method(md_version)
  File "/usr/lib/python2.6/dist-packages/ubuntuone/syncdaemon/volume_manager.py", line 558, in _upgrade_metadata_3
    share.path = share.path.replace(old_root_dir, self.m.root_dir)
AttributeError: 'NoneType' object has no attribute 'replace'

We're just about finished testing the fix now.

Integration testing has been run on 0.93.1. bug #420185 (Update to 0.93.1) is marked Confirmed.

This bug was fixed in the package ubuntuone-client - 0.93.1-0ubuntu1

---------------
ubuntuone-client (0.93.1-0ubuntu1) karmic; urgency=low

  * New upstream release.
    - Fix AttributeError in __hide_icon (LP: #419488)
    - Fix OSError crash in syncdaemon (LP: #419533)
    - Fix OSError in _upgrade_metadata_2 (LP: #405688)

ubuntuone-client (0.93.0-0ubuntu1) karmic; urgency=low

  * New upstream release.
    - Fix crash with KeyError in __getitem__ (LP: #404934)
    - Fix fatal error constant occurrances (LP: #414635)
    - Fix ability to reauthorize (LP: #406897)
    - Get rid of animated icon, and false activity status (LP: #414925)
  * Update Standards-Version to 3.8.3

 -- Rodney Dawes <email address hidden> Thu, 26 Aug 2009 17:15:00 -0400