Which version of JBoss AS is this? Going by your other post in this forum, I am assuming it's AS 5.1.0.
JBoss AS writes out the compiled JSPs to the JBOSS_HOME/server/< servername>/work folder. You might want to manually delete it during every release/backup cycle or you might want to automate it by setting deleteWorkDirOnContextDestroy to true (by default it's false) attribute in JBOSS_HOME/server/< servername>/deployers/jbossweb.deployer/META-INF/war-deployers-jboss-beans.xml file:
<!--Flag to delete the Work Dir on Context Destroy --> <property name="deleteWorkDirOnContextDestroy">true</property>
Setting this property to true will clear out the application's compiled jsps and other data from the work folder on every undeploy of the application.
Perfect. I will let you know if it doesnt work but looks like it will do the trick. Thanks for the help