AFAIK its actually Maven and JDK 1.6. But Hibernate is supposed to be built with 1.5 anyway so I tend to not worry about it much on my end. Others added the ability to build Hibernate with 1.6 against my recommendations. I too use 2.2.1 so it does work, just switch to JDK 1.5 to build. Note certain modules do need 1.6 available to build properly, but I am talking about the JDK used to launch Maven and to actually do the majority of compilation etc tasks. On Sun, 2010-09-19 at 22:17 +0200, Karel Maesen wrote: -- Steve Ebersole <steve(a)hibernate.org&gt; http://hibernate.org