c:\work\py\roundup_tmp\tracker>python import_all.py
Connection params: {'passwd': 'roundup', 'host': 'localhost', 'port': '3316', 'user': 'roundup'}
Closing connection...
Connection already closed.
Traceback (most recent call last):
  File "c:\work\py\roundup_tmp\tracker\import_all.py", line 3, in ?
    r.import_users()
  File "c:\work\py\roundup_tmp\tracker\rdp.py", line 51, in import_users
    self.open()
  File "c:\work\py\roundup_tmp\tracker\rdp.py", line 28, in open
    self.db = self.tracker.open('admin')
  File "C:\Python24\Lib\site-packages\roundup\instance.py", line 84, in open
    vars = {
  File "C:\Python24\Lib\site-packages\roundup\backends\rdbms_common.py", line 107, in __init__
    self.open_connection()
  File "C:\Python24\lib\site-packages\roundup\backends\back_mysql.py", line 150, in open_connection
    if not db_exists(self.config):
  File "C:\Python24\lib\site-packages\roundup\backends\back_mysql.py", line 93, in db_exists
    conn = MySQLdb.connect(**kwargs)
  File "C:\Python24\Lib\site-packages\MySQLdb\__init__.py", line 64, in Connect
    return Connection(*args, **kwargs)
  File "C:\Python24\Lib\site-packages\MySQLdb\connections.py", line 107, in __init__
    super(Connection, self).__init__(*args, **kwargs2)
TypeError: an integer is required

c:\work\py\roundup_tmp\tracker>python
Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import MySQLdb
>>> MySQLdb.__version__
'1.1.7'
>>> import roundup
>>> roundup.__version__
'0.8.0b1'

The same connection params, but no port is specified in config.ini:
Connection params: {'passwd': 'roundup', 'host': 'localhost', 'user': 'roundup'}