Wait a couple of days for 3.0.4 to come out. Reconfirm the problem and post again here if it persists.
we have similar problem (as I wrote in jboss-user maillist, subject "[JBoss-user] jetty bug?")
Using jboss-3.0.5RC2 downloaded from CVS changed nothing :-(
I believe this problem has been fixed in Jetty 4.2.4, which
should be included with jboss 3.0.5