Thanks for the reply. On a fresh install I only see the two following codec jars.
$ find ./ -name "*codec*"
./jboss-as-7.0.2.Final/modules/org/apache/commons/codec
./jboss-as-7.0.2.Final/modules/org/apache/commons/codec/main/commons-codec-1.4.jar.index
./jboss-as-7.0.2.Final/modules/org/apache/commons/codec/main/commons-codec-1.4.jar
./eclipse/plugins/org.apache.commons.codec_1.3.0.v20100518-1140.jar
le_roy