Which portal version are you using? I think this was fixed in jboss-portal-2.7.0.GA.
So, I was wrong. This still is the issue with 2.7.0.GA. You can get rid of it by using JBoss WS 3.0.4.GA binaries from http://www.jboss.org/downloading/?projectId=jbossws&url=/jbossws/downloads/jbossws-native-3.0.4.GA.zip
Do you need WSRP? If no, then you can simply remove portal-wsrp.sar and you will be all set.