"Invalid internal date"

[Dave Abrahams]

Hi All,

I'm getting this failure.  Anything we can do about that?
TIA,
Dave

--8<---------------cut here---------------start------------->8---
pluto:~ dave% offlineimap
 OfflineIMAP 6.3.3
Copyright (C) 2002 - 2010 John Goerzen <john at complete.org>

This software comes with ABSOLUTELY NO WARRANTY; see the file
COPYING for details.  This is free software, and you are welcome
to distribute it under the conditions laid out in COPYING.
Account sync BoostPro:
 ***** Processing account BoostPro
 Copying folder structure from IMAP to MappedIMAP
 Establishing connection to imap.gmail.com:993.
 Establishing connection to tunnel:MAIL=maildir:$HOME/Maildir /opt/local/libexec/dovecot/imap.
Folder sync [BoostPro]:
 Syncing INBOX: IMAP -> MappedIMAP
 Syncing [Gmail]/All Mail: IMAP -> MappedIMAP
Copy message 72915 from [Gmail]/All Mail:
 Copy message 72915 IMAP[[Gmail]/All Mail] -> MappedIMAP[[Gmail].All Mail]
 WARNING: ERROR attempting to copy message 72915 for account BoostPro:Traceback (most recent call last):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/offlineimap/folder/Base.py", line 334, in copymessageto
    newuid = dstfolder.savemessage(uid, message, flags, rtime)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/offlineimap/folder/UIDMaps.py", line 184, in savemessage
    newluid = self._mb.savemessage(self, -1, content, flags, rtime)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/offlineimap/folder/IMAP.py", line 435, in savemessage
    date, content)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/offlineimap/imaplib2.py", line 565, in append
    return self._simple_command(name, mailbox, flags, date_time, **kw)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/offlineimap/imaplib2.py", line 1492, in _simple_command
    return self._command_complete(self.