[wxPython] Crash in event.__del__ in wxPython2.3.2.1/Python2.2

My email application works fine with wxPython2.3.1 and Python2.1 but as I try
to port it to Python2.2/wxPython2.3.2.1, I'm getting a recurring crash. The
message is:

The instruction at "0x1e0323da" referenced memory at "0x20736168". The memory
could not be "read".

Using trace modified with a flush after every print I can see that we're on
line 13 of events.py when we die. This is the call to
eventsc.delete_wxEvent(self).

This delete appears to be associated with cleaning up the event handed in to
my OnIdle method on my wxApp class.

I believe this same thing happens to me with Python2.1 and 2.3.2.1 but I
haven't gone back to check that for sure.

Any suggestions on where to look or how to track this down? This is on
Windows2k.
Thanks
gb