[Pharo-users] CiteZen and Pharo 5 / Pharo4 tests

Hi, I wanted to use CiteZen, but there's no Pharo 5 version (wouldn't even load), so I tried Pharo 4 instead but the tests are not passing: all CZBibTest fail on MessageNotUnderstood: Metaclass>>allMethodsInCategory: is this known problem? Do I need to use a very specific build of Pharo 4? Thanks, Peter