3 is few, I just downloaded it today and after less than 1 min of opening it 
I faced it ;)

--------------------------------------------------
From: "Alexander Belchenko" <email address hidden>
Sent: Wednesday, September 29, 2010 6:12 PM
To: <email address hidden>
Subject: Re: [Bug 650708] Re: Crashes when trying to open project

> Wow, 3 bugs reports about the same problem as of today.
> /me scratches head
>
> -- 
> Crashes when trying to open project
> https://bugs.launchpad.net/bugs/650708
> You received this bug notification because you are a direct subscriber
> of a duplicate bug (651160).
>
> Status in Bazaar Explorer: Fix Released
>
> Bug description:
> Attempting to Create new Project or Initialize a new project with an 
> existing code base.
>
> Workspace Model: Feature Branches
> Options: "Move existing files"
>
> OS: Windows 7 x64
> Hardware: HP Pavilion Elite HPE
>
> Error:
>
> bzr: ERROR: exceptions.TypeError: argument 1 of PyQt4.QtCore.QVariant() 
> has an invalid type
>
> Traceback (most recent call last):
>   File "C:/Program Files (x86)/Bazaar/plugins\explorer\lib\explorer.py", 
> line 1450, in callable_with_cleanup
>   File "C:/Program Files (x86)/Bazaar/plugins\explorer\lib\explorer.py", 
> line 1618, in _open_location_task
>   File "C:/Program Files 
> (x86)/Bazaar/plugins\explorer\lib\location_viewer.py", line 161, in 
> add_location
>   File "C:/Program Files (x86)/Bazaar/plugins\explorer\lib\location.py", 
> line 178, in view
>   File "C:/Program Files 
> (x86)/Bazaar/plugins\explorer\lib\view_repository.py", line 272, in ui
>   File "C:/Program Files 
> (x86)/Bazaar/plugins\explorer\lib\view_repository.py", line 277, in 
> refresh_view
>   File "C:/Program Files 
> (x86)/Bazaar/plugins\explorer\lib\view_repository.py", line 287, in 
> _update_view
>   File "C:/Program Files 
> (x86)/Bazaar/plugins\explorer\lib\view_repository.py", line 394, in 
> _update_model
>   File "C:/Program Files 
> (x86)/Bazaar/plugins\explorer\widgets\conditional_dataview.py", line 109, 
> in setData
>   File "C:/Program Files 
> (x86)/Bazaar/plugins\explorer\widgets\conditional_dataview.py", line 172, 
> in set_raw_data
> TypeError: argument 1 of PyQt4.QtCore.QVariant() has an invalid type
>
> bzr 2.2.1 on python 2.6.4 (win32)
> arguments: ['C:\\Program Files (x86)\\Bazaar\\bzrw.exe', 'explorer']
> encoding: 'cp1252', fsenc: 'mbcs', lang: None
> plugins:
>   bzrtools             C:\Program Files (x86)\Bazaar\plugins\bzrtools 
> [2.2.0]
>   colo                 C:\Program Files (x86)\Bazaar\plugins\colo [0.1.0]
>   explorer             C:\Program Files (x86)\Bazaar\plugins\explorer 
> [1.1.0]
>   fastimport           C:\Program Files (x86)\Bazaar\plugins\fastimport 
> [0.9.0dev]
>   launchpad            C:\Program Files (x86)\Bazaar\plugins\launchpad 
> [2.2.1]
>   loom                 C:\Program Files (x86)\Bazaar\plugins\loom 
> [2.2.1dev]
>   netrc_credential_store C:\Program Files 
> (x86)\Bazaar\plugins\netrc_credential_store [2.2.1]
>   news_merge           C:\Program Files (x86)\Bazaar\plugins\news_merge 
> [2.2.1]
>   pipeline             C:\Program Files (x86)\Bazaar\plugins\pipeline 
> [unknown]
>   qbzr                 C:\Program Files (x86)\Bazaar\plugins\qbzr [0.19.2]
>   rewrite              C:\Program Files (x86)\Bazaar\plugins\rewrite 
> [0.6.1]
>   svn                  C:\Program Files (x86)\Bazaar\plugins\svn [1.0.4]
>   upload               C:\Program Files (x86)\Bazaar\plugins\upload 
> [1.0.0dev]
>   xmloutput            C:\Program Files (x86)\Bazaar\plugins\xmloutput 
> [0.8.6]
>
>
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/bzr-explorer/+bug/650708/+subscribe
>