i have updated the hibernate library properties of the pvm.
lib.hibernate.version=3.2.3.GA
lib.hibernate.annotations.version=3.3.0.GA
lib.hibernate.entitymanager.version=3.3.1.GA
this is the set of latest stable releases as indicated in the compatibility matrix
http://hibernate.org/6.html these libs are not yet in repository. i asked the guys from hibernate if we're allowed to fix it.
for the moment, the only workaround is to download libraries and put them in the right location in the repository manually.
sorry for the inconvenience.
