Crashes on startup: "Improper shutdown detected..."

[t0p]

When I try to start Kabikaboo via GUI nothing happens. When I try to start via command line I get an error, "Improper shutdown detected..."; an example:

t0p@mars:~$ kabikaboo .kabikaboo/General.kaboo
Improper shutdown detected...
Traceback (most recent call last):
  File "/usr/share/kabikaboo/src/kabikaboo.py", line 3176, in <module>
    editor.initialize_interface()
  File "/usr/share/kabikaboo/src/kabikaboo.py", line 65, in initialize_interface
    self.open_file_on_startup()
  File "/usr/share/kabikaboo/src/kabikaboo.py", line 1203, in open_file_on_startup
    file_opened, opened_document = self.file.open(self.document)
  File "/usr/share/kabikaboo/src/file.py", line 97, in open
    return self.load_last_saved()
  File "/usr/share/kabikaboo/src/file.py", line 106, in load_last_saved
    return self.load_from_file_pickle(self.working_file)
  File "/usr/share/kabikaboo/src/file.py", line 288, in load_from_file_pickle
    return result, document
UnboundLocalError: local variable 'document' referenced before assignmentif

If I try to run Kabikaboo with a non-existant file, the error is the same, eg

t0p@mars:~$ kabikaboo nosuchfile
Improper shutdown detected...
Traceback (most recent call last):
  File "/usr/share/kabikaboo/src/kabikaboo.py", line 3176, in <module>
    editor.initialize_interface()
  File "/usr/share/kabikaboo/src/kabikaboo.py", line 65, in initialize_interface
    self.open_file_on_startup()
  File "/usr/share/kabikaboo/src/kabikaboo.py", line 1203, in open_file_on_startup
    file_opened, opened_document = self.file.open(self.document)
  File "/usr/share/kabikaboo/src/file.py", line 97, in open
    return self.load_last_saved()
  File "/usr/share/kabikaboo/src/file.py", line 106, in load_last_saved
    return self.load_from_file_pickle(self.working_file)
  File "/usr/share/kabikaboo/src/file.py", line 288, in load_from_file_pickle
    return result, document
UnboundLocalError: local variable 'document' referenced before assignment

I don't know the version number of Kabikaboo I'm using. It's the version that runs on Ubuntu 12.04