we have some legacy ZEN applications build upon CSS2 style definitions. We moved the application due to an upgrade to a newer version of cache (2017.2.1). Anyway I have in mind that in one of the prior relases css3 style interpretation was enforced by ZEN and you could explecitly tell the framework to use CSS2 by setting a global. Anyway I can´t found any hints in the docs on that. Does anyone of the %ZEN gurus have this in mind?