In fact, the XML transformer factory of the JDK is forced. This was introduced by svn#20024 to fix a NPE thrown by xalan 2.7.0. Instead of forcing the XML transformer, it's better to upgrade the version of Xalan to 2.7.1. We can't remove Xalan because it is needed by Rampart: see PETALSBCSOAP-94.
Already fixed in the trunk