Sudden Failure ?

[Marvin Pierce <mpierce@xxxxxxxxxxxx>]

For 2-days, I have had the program running and checking two servers for
three accounts. All of a sudden it now refuses to run failing with the
following messages and I'd like to know how I fix this. 

I've tried deleting the IMAP folders where it is depositing mail, etc.
without success and removed ~/.offlineimap.

Here are failure messages:

mpierce@libranet:~$ Thread 'Folder sync Optus-mrpierce[INBOX.Trash]'
terminated with exception:
Traceback (most recent call last):
  File "/usr/lib/python2.2/site-packages/offlineimap/threadutil.py",
line 153, in run
    Thread.run(self)
  File "/usr/lib/python2.2/threading.py", line 402, in run
    apply(self.__target, self.__args, self.__kwargs)
  File "/usr/lib/python2.2/site-packages/offlineimap/accounts.py", line
197, in syncfolder
    remotefolder.getuidvalidity())
  File "/usr/lib/python2.2/site-packages/offlineimap/ui/UIBase.py", line
213, in validityproblem
    s.warn("UID validity problem for folder %s (saved %d; got %d);
skipping it" % \
TypeError: warn() takes exactly 3 arguments (2 given)


Last 1 debug messages logged for Folder sync Optus-mrpierce[INBOX.Trash]
prior to exception:
imap: Attempting plain authentication