obfuscated jars run fail using jetty 5.1.11

[Sue Sun]

We have been running obfuscated jars (created by DashOPro) without
any problem using jetty 4.x version.
Currently we upgrade jetty to jetty 5.1.11, then we encounter some
problem (see below error message) when using web tool. Could anyone have any clue. Any comments will be highly appreciated.

Thanks,
Sue

Error msg excerpt:
---------------------------

2007-12-13 18:34:34,496 [SocketListener0-3] DEBUG
org.mortbay.http.ContextLoader - try loadClass be fro
m sun.misc.Launcher$AppClassLoader@169e11
2007-12-13 18:34:34,496 [SocketListener0-3] DEBUG
org.mortbay.http.ContextLoader - p0 loaded class be
2007-12-13 18:34:34,497 [SocketListener0-3] WARN
org.mortbay.jetty.servlet.ServletHandler - Error for /
login.do
java.lang.VerifyError: (class:
com/oxrs/epp/struts/action/AbstractRoleBase, method: ProcessBaseResponse
signature:
(Lcom/oxrs/epp/core/dom/epp_Response;Ljava/lang/String;Lcom/oxrs/epp/struts/form/AbstractRo
leForm V) Incompatible argument to function
at com.oxrs.epp.struts.ServletUtils
$LoginUser.initialize(DashoA14*..:488)
at com.oxrs.epp.struts.ServletUtils.login(DashoA14*..:107)
at
com.oxrs.epp.struts.action.LoginAction.perform(DashoA14*..:72)
at
org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.java:1756)
at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1560)
at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:509)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
at
org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:473)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
at
org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
at org.mortbay.http.HttpServer.service(HttpServer.java:909)
at
org.mortbay.http.HttpConnection.service(HttpConnection.java:820)
at
org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:986)
at
org.mortbay.http.HttpConnection.handle(HttpConnection.java:837)
at
org.mortbay.http.SocketListener.handleConnection(SocketListener.java:245)
at
org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
at org.mortbay.util.ThreadPool
$PoolThread.run(ThreadPool.java:534)

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