I've been at this for some time and read many sites on the subject. suspect I have junk lying about causing this problem. But where?

This is the error when I import MySQLdb in python:

>>> import MySQLdb
    /Library/Python/2.6/site-packages/MySQL_python-1.2.3c1-py2.6-macosx-10.6-universal.egg/_mysql.py:3: UserWarning: Module _mysql was already imported from /Library/Python/2.6/site-packages/MySQL_python-1.2.3c1-py2.6-macosx-10.6-universal.egg/_mysql.pyc, but /Users/phoebebr/Downloads/MySQL-python-1.2.3c1 is being added to sys.path
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "MySQLdb/__init__.py", line 19, in <module>
        import _mysql
      File "build/bdist.macosx-10.6-universal/egg/_mysql.py", line 7, in <module>
      File "build/bdist.macosx-10.6-universal/egg/_mysql.py", line 6, in __bootstrap__
    ImportError: dlopen(/Users/phoebebr/.python-eggs/MySQL_python-1.2.3c1-py2.6-macosx-10.6-universal.egg-tmp/_mysql.so, 2): no suitable image found.  Did find:
        /Users/phoebebr/.python-eggs/MySQL_python-1.2.3c1-py2.6-macosx-10.6-universal.egg-tmp/_mysql.so: mach-o, but wrong architecture

I'm trying for 64 bit so checked here:

file $(which python)
/usr/bin/python: Mach-O universal binary with 3 architectures
/usr/bin/python (for architecture x86_64):  Mach-O 64-bit executable x86_64
/usr/bin/python (for architecture i386):    Mach-O executable i386
/usr/bin/python (for architecture ppc7400): Mach-O executable ppc
file $(which mysql)
/usr/local/mysql/bin/mysql: Mach-O 64-bit executable x86_64

Have set my default version of python to 2.6

python
Python 2.6.1 (r261:67515, Feb 11 2010, 00:51:29) 
[GCC 4.2.1 (Apple Inc. build 5646)] on darwin

Tried deleting build directory and python setup.py clean Renamed Python/2.5/site-packages so it could not try and pick that up.

Run out of ideas. Any suggestions?