Hi, I just issued this pull request: https://github.com/zopefoundation/zope.app.publication/pull/1 It is about a slight improvement in the way publication factories are looked up for particular request-method/mime-type registrations. Having this fixed, would make our life easier registering publication factories for specific purposes. Would someone be interested to have a look at it? Thank you in advance! regards, jw p.s. Note how the test for Python-2.7 //run from tox// do not pass. They do pass for Python-3.3, //and// the do pass for Python-2.7 when run using the testrunner directly (./bin/test in the buildout). I have no idea yet why this happens though... Need to be looked at I guess before actually merging the pull request.