dh_pysupport -a fails in private/movemodules with python2.6

Binary package hint: python-support

During rebuild testing for karmic, the following class of errors shows up:

(quoting from the build attempt of ed_1.4-1 on i386):

   dh_pysupport -a
        /usr/share/python-support/private/movemodules debian/ed
Traceback (most recent call last):
  File "/usr/share/python-support/private/movemodules", line 9, in <module>
    from hashlib import md5
  File "/usr/lib/python2.6/hashlib.py", line 136, in <module>
    md5 = __get_builtin_constructor('md5')
  File "/usr/lib/python2.6/hashlib.py", line 63, in __get_builtin_constructor
    import _md5
ImportError: No module named _md5
dh_pysupport: /usr/share/python-support/private/movemodules returned exit code 1