middleware causing deepcopy bug

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Install django-swaps
2. try to access the Accepted or Dead swaps pages
3.

What is the expected output? What do you see instead?
Page fails with this error: instancemethod expected at least 2 arguments, got 0

What version of the product are you using? On what operating system?
Running your latest trunk version.  CentOS 5, Django 1.0.2, Python 2.5.2

Please provide any additional information below.
When I remove the 'search.middleware.LuceneMiddleware' from my 
MIDDLEWARE_CLASSES, the 
problem goes away, so it must be in that middleware.

In trying to track down this error msg, this was the closest thing we found.  
Not sure if it is 
relevant at all, but figure I'd include it here in case it is:
http://code.djangoproject.com/ticket/7204

fyi, my django-swaps install was part of my Pinax installation, but I doubt 
that makes a 
difference.

Original issue reported on code.google.com by [email protected] on 26 Apr 2009 at 5:01