Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/screenlets/__init__.py", line 1935, in menuitem_callback
    self.on_menuitem_select(id)
  File "/usr/share/screenlets/MailCheck/MailCheckScreenlet.py", line 307, in on_menuitem_select
    self.run_mailcheck()
  File "/usr/share/screenlets/MailCheck/MailCheckScreenlet.py", line 196, in run_mailcheck
    if not self.__mailbackend.refreshing:
AttributeError: 'NoneType' object has no attribute 'refreshing'