There are currently 17 startup warnings in the logs for 10 and trunk for
2014-05-27 00:22:21,810 WARN localhost-startStop-1 org.hibernate.util.DTDEntityResolver - recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
These should be updated across the code so these don't cause problems or print warnings.
I'm seeing instances in signup, shortenedurl, common, sitestats, hierarchy, msgcntr, samigo, profile2.
Note that updating these breaks compatibility with 2.9.