install fails - two files missing

Binary package hint: mailman

edgy 64 server

postfix-to-mailman.py and qmail-to-mailman.py are not installed in /etc/mailman but are symlinked from /usr/lib/mailman/bin/ to /etc/mailman

they are located in /usr/share/mailman/ and can be copied to /etc/mailman

mailman appears to work - at least qrunner starts without error messages

Steps to demonstrate issue

While instaling smartmon, this error returned

 * Starting Mailman master qrunner mailmanctl [ ok ]
Traceback (most recent call last):
  File "/usr/sbin/update-python-modules", line 274, in ?
    bytecompile_privatedir(basedir)
  File "/usr/sbin/update-python-modules", line 205, in bytecompile_privatedir
    process(basedir,bytecompile_only)
  File "/usr/sbin/update-python-modules", line 154, in process
    func(basedir, dir, file)
  File "/usr/sbin/update-python-modules", line 90, in bytecompile_only
    compile(fullpath)
  File "/usr/lib/python2.4/py_compile.py", line 115, in compile
    f = open(file, 'U')
IOError: [Errno 2] No such file or directory: '/usr/lib/mailman/bin/postfix-to-mailman.py'
dpkg: error processing mailman (--configure):
 subprocess post-installation script returned error exit status 1