Description of problem:
I try caribou 0.3.91-1 in Fedora 16 ,i cannot see a keyboard. As soon as I move the focus to an entry or other text input field, I get:

Tracback (most recent call last):
  File "/usr/lib/python2.7/site-packages/pyatspi/registry.py", line 193, in eventWrapper
    return callback(event)
  File "/usr/lib/python2.7/site-packages/caribou/daemon/main.py", line 142, in on_focus
    self._set_entry_location(acc)
  File "/usr/lib/python2.7/site-packages/caribou/daemon/main.py", line 124, in _set_entry_location
    self.keyboard_proxy.SetCursorLocation(bx, by, bw, bh)
  File "/usr/lib/python2.7/site-packages/dbus/proxies.py", line 68, in __call__
    return self._proxy_method(*args, **keywords)
  File "/usr/lib/python2.7/site-packages/dbus/proxies.py", line 140, in __call__
    **keywords)
  File "/usr/lib/python2.7/site-packages/dbus/connection.py", line 630, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Failed: TypeError: this.actor is null
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/pyatspi/registry.py", line 193, in eventWrapper
    return callback(event)
  File "/usr/lib/python2.7/site-packages/caribou/daemon/main.py", line 142, in on_focus
    self._set_entry_location(acc)
  File "/usr/lib/python2.7/site-packages/caribou/daemon/main.py", line 124, in _set_entry_location
    self.keyboard_proxy.SetCursorLocation(bx, by, bw, bh)
  File "/usr/lib/python2.7/site-packages/dbus/proxies.py", line 140, in __call__
    **keywords)
  File "/usr/lib/python2.7/site-packages/dbus/connection.py", line 630, in call_blocking
    message, timeout)
TypeError: More items found in D-Bus signature than in Python arguments


can anyone give helps? Thanks

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.prepare fedora16
2.yum install caribou caribou-devel
3.reboot
  
Actual results:


Expected results:


Additional info: