gwibber:
  Installed: 2.0.0~bzr465-0ubuntu1
  Candidate: 2.0.0~bzr465-0ubuntu1
  Version table:
 *** 2.0.0~bzr465-0ubuntu1 0
        100 /var/lib/dpkg/status
     2.0.0~bzr449-0ubuntu1 0
        500 http://au.archive.ubuntu.com karmic/universe Packages

I can confirm this problem: The output from gwibber-daemon seems normal:

WARNING:root:desktopcouch is not available. .  falling back to gconf
DEBUG:gwibber:Scheduled Op: <receive:twitter>
DEBUG:gwibber:Scheduled Op: <responses:twitter>
DEBUG:gwibber:Scheduled Op: <private:twitter>
DEBUG:gwibber:Scheduled Op: <receive:identica>
DEBUG:gwibber:Scheduled Op: <responses:identica>
DEBUG:gwibber:Scheduled Op: <private:identica>
DEBUG:gwibber:Scheduled Op: <receive:facebook>
DEBUG:gwibber:Queueing Op: <receive:identica>
DEBUG:gwibber:Queueing Op: <private:twitter>
DEBUG:gwibber:Queueing Op: <responses:twitter>
DEBUG:gwibber:Queueing Op: <private:identica>
DEBUG:gwibber:Queueing Op: <responses:identica>
DEBUG:gwibber:Queueing Op: <receive:twitter>
DEBUG:gwibber:Queueing Op: <receive:facebook>
DEBUG:gwibber:Performing Op: <receive:identica>
DEBUG:gwibber:Performing Op: <private:twitter>
DEBUG:gwibber:Performing Op: <responses:twitter>
DEBUG:gwibber:Performing Op: <private:identica>
DEBUG:gwibber:Starting scheduled operations
DEBUG:gwibber:Finished Op: <private:twitter>
DEBUG:gwibber:Performing Op: <responses:identica>
DEBUG:gwibber:Starting scheduled operations
DEBUG:gwibber:Finished Op: <responses:twitter>
DEBUG:gwibber:Starting scheduled operations
DEBUG:gwibber:Finished Op: <receive:identica>
DEBUG:gwibber:Performing Op: <receive:twitter>
DEBUG:gwibber:Performing Op: <receive:facebook>
DEBUG:gwibber:Starting scheduled operations
DEBUG:gwibber:Finished Op: <private:identica>
DEBUG:gwibber:Starting scheduled operations
DEBUG:gwibber:Finished Op: <responses:identica>
DEBUG:gwibber:Starting scheduled operations
DEBUG:gwibber:Finished Op: <receive:twitter>
DEBUG:gwibber:Starting scheduled operations
DEBUG:gwibber:Finished Op: <receive:facebook>
DEBUG:gwibber:Loading Complete

However, the output from the Gwibber client is:

WARNING:root:desktopcouch is not available. .  falling back to gconf

** (gwibber:26800): WARNING **: Trying to register gtype 'WnckWindowState' as flags when in fact it is of type 'GEnum'

** (gwibber:26800): WARNING **: Trying to register gtype 'WnckWindowActions' as flags when in fact it is of type 'GEnum'

** (gwibber:26800): WARNING **: Trying to register gtype 'WnckWindowMoveResizeMask' as flags when in fact it is of type 'GEnum'
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 561, in change_view
    self.update_view()
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 625, in update_view
    self.content_view.display_page("home.mako", messages)
  File "/usr/lib/python2.6/dist-packages/gwibber/gwui.py", line 274, in display_page
    template_path = os.path.join(theme_path, template_name)
  File "/usr/lib/python2.6/posixpath.py", line 67, in join
    elif path == '' or path.endswith('/'):
AttributeError: 'NoneType' object has no attribute 'endswith'
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/apport_python_hook.py", line 100, in apport_excepthook
    os.O_WRONLY|os.O_CREAT|os.O_EXCL), 'w')
OSError: [Errno 13] Permission denied: '/var/crash/_usr_bin_gwibber.1000.crash'

Original exception was:
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 561, in change_view
    self.update_view()
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 625, in update_view
    self.content_view.display_page("home.mako", messages)
  File "/usr/lib/python2.6/dist-packages/gwibber/gwui.py", line 274, in display_page
    template_path = os.path.join(theme_path, template_name)
  File "/usr/lib/python2.6/posixpath.py", line 67, in join
    elif path == '' or path.endswith('/'):
AttributeError: 'NoneType' object has no attribute 'endswith'
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 561, in change_view
    self.update_view()
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 625, in update_view
    self.content_view.display_page("home.mako", messages)
  File "/usr/lib/python2.6/dist-packages/gwibber/gwui.py", line 274, in display_page
    template_path = os.path.join(theme_path, template_name)
  File "/usr/lib/python2.6/posixpath.py", line 67, in join
    elif path == '' or path.endswith('/'):
AttributeError: 'NoneType' object has no attribute 'endswith'
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/apport_python_hook.py", line 100, in apport_excepthook
    os.O_WRONLY|os.O_CREAT|os.O_EXCL), 'w')
OSError: [Errno 13] Permission denied: '/var/crash/_usr_bin_gwibber.1000.crash'

Original exception was:
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 561, in change_view
    self.update_view()
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 625, in update_view
    self.content_view.display_page("home.mako", messages)
  File "/usr/lib/python2.6/dist-packages/gwibber/gwui.py", line 274, in display_page
    template_path = os.path.join(theme_path, template_name)
  File "/usr/lib/python2.6/posixpath.py", line 67, in join
    elif path == '' or path.endswith('/'):
AttributeError: 'NoneType' object has no attribute 'endswith'
ERROR:dbus.connection:Exception in handler for D-Bus signal:
Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 214, in maybe_handle_message
    self._handler(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 595, in on_loading_complete
    self.update_view()
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 625, in update_view
    self.content_view.display_page("home.mako", messages)
  File "/usr/lib/python2.6/dist-packages/gwibber/gwui.py", line 274, in display_page
    template_path = os.path.join(theme_path, template_name)
  File "/usr/lib/python2.6/posixpath.py", line 67, in join
    elif path == '' or path.endswith('/'):
AttributeError: 'NoneType' object has no attribute 'endswith'


Hope this helps