[orca-list] I can not navigate in some messages in TB and receive a trace back in the debug

[Josà Vilmar EstÃcio de Souza <vilmar informal com br>]

Hi all,
As posted before, when using thunderbird 8.0 or above, ubuntu 11.10 and 
latest orca from git, I can not navigate in a message using the arrows.

I found the following trace in the debug of orca:

KEYBOARDEVENT: type=0
                id=65364
                hw_code=116
                modifiers=0
                event_string=(Down)
                keyval_name=(Down)
                is_text=True
                timestamp=1405965
                time=1327270531.445349
                keyType=navigation
                shouldEcho=False

----------> QUEUEING <ENUM ATSPI_KEY_PRESSED_EVENT OF TYPE EVENTTYPE> 
'Down' (116)
DEQUEUED <ENUM ATSPI_KEY_PRESSED_EVENT OF TYPE EVENTTYPE> 'Down' (116) 
<----------

vvvvv PROCESS <ENUM ATSPI_KEY_PRESSED_EVENT OF TYPE EVENTTYPE> 'Down' 
(116) vvvvv

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/orca/input_event.py", 
line 505, in processInputEvent
    consumed = self.function(script, inputEvent)
  File 
"/usr/local/lib/python2.7/dist-packages/orca/scripts/toolkits/Gecko/script.py", 
line 5842, in goNextLine
    [nextObj, nextCharOffset] = self.findNextLine(obj, characterOffset)
  File 
"/usr/local/lib/python2.7/dist-packages/orca/scripts/toolkits/Gecko/script.py", 
line 5720, in findNextLine
    index = self.findObjectOnLine(obj, characterOffset, currentLine)
  File 
"/usr/local/lib/python2.7/dist-packages/orca/scripts/toolkits/Gecko/script.py", 
line 2008, in findObjectOnLine
    if candidate.getRole() in [pyatspi.ROLE_LIST,
  File "/usr/lib/python2.7/dist-packages/pyatspi/Accessibility.py", 
line 172, in <lambda>
    Atspi.Accessible.getRole = lambda *args: 
exwrap(Atspi.Accessible.get_role, *args)
  File "/usr/lib/python2.7/dist-packages/pyatspi/Accessibility.py", 
line 154, in exwrap
    raise LookupError
LookupError

^^^^^ PROCESS <ENUM ATSPI_KEY_PRESSED_EVENT OF TYPE EVENTTYPE> 'Down' 
(116) ^^^^^


The interesting part is that if I reload the preferences of orca, the 
problem desappears temporarily.

May I open a bug in orca bugzilla?
Thanks.