offlineimap/python problem

[Jamie Griffin]

Hi

I've installed offlineimap just now using macports. The build process went ok, except when i try to run offlineimap i get this error: 
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Traceback (most recent call last):
  File "/opt/local/bin/offlineimap", line 20, in <module>
    from offlineimap import init
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/offlineimap/init.py", line 20, in <module>
    from offlineimap import imapserver, repository, folder, mbnames, threadutil, version, syncmaster, accounts
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/offlineimap/folder/__init__.py", line 1, in <module>
    import Base, Gmail, IMAP, Maildir, LocalStatus
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/offlineimap/folder/Maildir.py", line 23, in <module>
    import os.path, os, re, time, socket, md5
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/md5.py", line 6, in <module>
    from hashlib import md5
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/hashlib.py", line 133, in <module>
    md5 = __get_builtin_constructor('md5')
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/hashlib.py", line 60, in __get_builtin_constructor
    import _md5
ImportError: No module named _md5

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I have no idea how to fix this. Has anyne else had this issue and does onyone know what i can do to put it right. 

I'm using mac os x 10.4.11 with the latest macports installation for tiger. 

The version of offlineimap installed is 6.0.3_0

TIA, 

Jamie