Sounds like a slow session start up to me as it happens either after leaving the browser for a bit, or switching browser types. Check what is happening when a new session is started. Are you hitting any authentication services, EJB's, etc. Is there something which happens on session start which requires work. Then Id also check the JVM settings and make sure it has plenty of memory, maybe tweak the startup params in the startup scripts. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3957623#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...