In UbiquitySyslog:

Aug  3 16:33:47 ubuntu ubiquity: dpkg: warning: overriding problem because --force enabled:
Aug  3 16:33:47 ubuntu ubiquity:  
Aug  3 16:33:47 ubuntu ubiquity: This is an essential package - it should not be removed.
Aug  3 16:33:47 ubuntu ubiquity: 
Aug  3 16:33:47 ubuntu ubiquity: Removing dash ...
Aug  3 16:33:47 ubuntu ubiquity: Removing 'diversion of /bin/sh to /bin/sh.distrib by dash'
Aug  3 16:33:47 ubuntu ubiquity: dpkg-divert: error: rename involves overwriting `/bin/sh' with
Aug  3 16:33:47 ubuntu ubiquity:   different file `/bin/sh.distrib', not allowed
Aug  3 16:33:47 ubuntu ubiquity: dpkg: error processing dash (--remove):
Aug  3 16:33:47 ubuntu ubiquity:  subprocess installed pre-removal script returned error exit status 2
Aug  3 16:33:47 ubuntu ubiquity: No apport report written because MaxReports is reached already
Aug  3 16:33:49 ubuntu ubiquity: Removing dc ...
Aug  3 16:33:50 ubuntu ubiquity: Removing libatk-adaptor-data ...
Aug  3 16:33:51 ubuntu ubiquity: Removing gwibber-service-twitter ...
Aug  3 16:33:51 ubuntu ubiquity: Removing gwibber-service-identica ...
Aug  3 16:33:52 ubuntu ubiquity: Removing libgwibber2 ...
Aug  3 16:33:52 ubuntu ubiquity: Removing gwibber-service-facebook ...
Aug  3 16:33:53 ubuntu ubiquity: Removing gwibber-service ...
Aug  3 16:33:53 ubuntu ubiquity: Removing totem-common ...
Aug  3 16:33:54 ubuntu ubiquity: Removing rhythmbox-data ...
Aug  3 16:33:55 ubuntu ubiquity: Removing libgweather-common ...
Aug  3 16:33:56 ubuntu ubiquity: Removing libgnomekbd-common ...
Aug  3 16:33:56 ubuntu ubiquity: Removing unity-lens-files ...
Aug  3 16:33:57 ubuntu ubiquity: Removing telepathy-logger ...
Aug  3 16:33:58 ubuntu ubiquity: Removing evince-common ...
Aug  3 16:33:59 ubuntu ubiquity: Removing unity-2d-common ...
Aug  3 16:33:59 ubuntu ubiquity: Removing libfolks-telepathy25 ...
Aug  3 16:34:00 ubuntu ubiquity: Removing libfolks25 ...
Aug  3 16:34:00 ubuntu ubiquity: Removing folks-common ...
Aug  3 16:34:01 ubuntu ubiquity: Removing telepathy-gabble ...
Aug  3 16:34:01 ubuntu ubiquity: Removing gstreamer0.10-nice:i386 ...
Aug  3 16:34:02 ubuntu ubiquity: Removing libnice10:i386 ...
Aug  3 16:34:02 ubuntu ubiquity[4002]: Reverting lockdown of the desktop environment.
Aug  3 16:34:02 ubuntu activate-dmraid: No Serial ATA RAID disks detected
Aug  3 16:34:03 ubuntu ubiquity: Removing libgupnp-igd-1.0-4:i386 ...
Aug  3 16:34:03 ubuntu ubiquity: Removing libgupnp-1.0-4 ...
Aug  3 16:34:03 ubuntu ubiquity: umount: /target: device is busy.
Aug  3 16:34:03 ubuntu ubiquity:         (In some cases useful info about processes that use
Aug  3 16:34:03 ubuntu ubiquity:          the device is found by lsof(8) or fuser(1))
Aug  3 16:34:03 ubuntu ubiquity: 
Aug  3 16:34:03 ubuntu ubiquity[4002]: Traceback (most recent call last):
Aug  3 16:34:03 ubuntu ubiquity[4002]:   File "/usr/lib/ubiquity/ubiquity/misc.py", line 202, in boot_device
Aug  3 16:34:03 ubuntu ubiquity[4002]:     for disk in p.disks():
Aug  3 16:34:03 ubuntu ubiquity[4002]:   File "/usr/lib/ubiquity/ubiquity/parted_server.py", line 161, in disks
Aug  3 16:34:03 ubuntu ubiquity[4002]:     return sorted(os.listdir(devices))
Aug  3 16:34:03 ubuntu ubiquity[4002]: OSError: [Errno 2] No such file or directory: '/var/lib/partman/devices'
Aug  3 16:34:03 ubuntu ubiquity[4002]: 
Aug  3 16:34:03 ubuntu ubiquity[4002]: Traceback (most recent call last):
Aug  3 16:34:03 ubuntu ubiquity[4002]:   File "/usr/lib/ubiquity/ubiquity/misc.py", line 202, in boot_device
Aug  3 16:34:03 ubuntu ubiquity[4002]:     for disk in p.disks():
Aug  3 16:34:03 ubuntu ubiquity[4002]:   File "/usr/lib/ubiquity/ubiquity/parted_server.py", line 161, in disks
Aug  3 16:34:03 ubuntu ubiquity[4002]:     return sorted(os.listdir(devices))
Aug  3 16:34:03 ubuntu ubiquity[4002]: OSError: [Errno 2] No such file or directory: '/var/lib/partman/devices'
Aug  3 16:34:03 ubuntu ubiquity[4002]: 
Aug  3 16:34:03 ubuntu ubiquity[4002]: debconffilter_done: ubi-partman (current: ubi-partman)
Aug  3 16:34:03 ubuntu ubiquity[4002]: Reverting lockdown of the desktop environment.
Aug  3 16:34:04 ubuntu ubiquity: Removing librest-0.7-0:i386 ...