apache 2.2. gives an error 500 Internal Server Error during authentication from mod_python script. look also at this: http://www.modpython.org/pipermail/mod_python/2006-October/022388.html please add the patch suggested for 3.3.1 version. Reproducible: Always
Use AuthBasicAuthoritative off, please. There's apparently not any agreement on how the issues should be patches on the usptream bug.