[mod_python] 3.1.2b and worker_mpm

Is anyone else out there using mod_python with the worker_mpm on Apache 
2?  I'm having issues with requests getting mixed up.  I have an output 
filter which is gathering information about requests and storing them in a 
stats database and then it's calling filter.pass_on().  The problem is that 
when I request a big image, I get part of the image in the response body, 
and part of an unrelated html request in the response body.  So I have an 
invalid image and someone else probably has an invalid html page.  I've 
found this much easier to reproduce with larger files.  It only happens 
when there is simultaneous traffic on the server.  If I redirect the 
traffic to an older server and run tests on the mod_python server without 
outside traffic then it runs just fine.

I'm running the latest cvs as of a week ago.  Apache 2.0.48.

Has anyone else experienced this?

-Dan