The jbossts-common.jar is including the log4j commons logging logger impl:
[starksm@succubus testsuite]$ jar -tf
/home/svn/JBossAS/JBoss4.2/Branch_4_2/build/output/jboss-4.2.0.CR1/server/default/lib/jbossts-common.jar
common.properties
org/apache/commons/logging/impl/Log4JLogger.class
this breaks out ability to patch the commons logging version with an
alternate implementation. This class should be removed from the
jbossts-common.jar. The common.properties should also be a configuration
element as the server level, not an implicit resource in a library jar.