Sun Java System Web Server 7.0 breaks JIRA add portlet functionality - "Action 'saveportlet' not found or could not be initialized: java.lang.ClassNotFoundException: saveportlet"

[14/Sep/2007:14:11:19] failure (17655): for host 127.0.0.1 trying to GET /jira/secure/saveportlet!default.jspa, service-j2ee reports: Could not execute action
java.lang.IllegalArgumentException: Action 'saveportlet' not found or could not be initialized: java.lang.ClassNotFoundException: saveportlet
        at webwork.action.factory.JavaActionFactory.getActionImpl(JavaActionFactory.java:64)
        at webwork.action.factory.ScriptActionFactoryProxy.getActionImpl(ScriptActionFactoryProxy.java:54)
        at webwork.action.factory.XMLActionFactoryProxy.getActionImpl(XMLActionFactoryProxy.java:54)
        at webwork.action.factory.PrefixActionFactoryProxy.getActionImpl(PrefixActionFactoryProxy.java:102)
        at webwork.action.factory.JspActionFactoryProxy.getActionImpl(JspActionFactoryProxy.java:53)
        at webwork.action.factory.CommandActionFactoryProxy.getActionImpl(CommandActionFactoryProxy.java:62)
        at webwork.action.factory.AliasingActionFactoryProxy.getActionImpl(AliasingActionFactoryProxy.java:96)
        at webwork.action.factory.CommandActionFactoryProxy.getActionImpl(CommandActionFactoryProxy.java:53)
        at webwork.action.factory.ContextActionFactoryProxy.getActionImpl(ContextActionFactoryProxy.java:36)
        at webwork.action.factory.PrepareActionFactoryProxy.getActionImpl(PrepareActionFactoryProxy.java:37)
        at webwork.action.factory.ParametersActionFactoryProxy.getActionImpl(ParametersActionFactoryProxy.java:46)
        at webwork.action.factory.ChainingActionFactoryProxy.getActionImpl(ChainingActionFactoryProxy.java:52)
        at webwork.action.factory.DefaultActionFactory.getActionImpl(DefaultActionFactory.java:125)
        at webwork.action.factory.ActionFactory.getAction(ActionFactory.java:63)
        at webwork.dispatcher.GenericDispatcher.executeAction(GenericDispatcher.java:120)
        at com.atlassian.jira.web.dispatcher.JiraServletDispatcher.service(JiraServletDispatcher.java:209)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:917)
        at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:391)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:297)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:178)
        at com.atlassian.jira.web.filters.AccessLogFilter.doFilter(AccessLogFilter.java:51)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:178)
        at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)
        at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)
        at com.atlassian.jira.web.filters.SitemeshExcludePathFilter.doFilter(SitemeshExcludePathFilter.java:38)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:178)
        at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:182)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:178)
        at com.atlassian.seraph.filter.LoginFilter.doFilter(LoginFilter.java:181)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:178)
        at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:132)
        at com.atlassian.jira.web.filters.JIRAProfilingFilter.doFilter(JIRAProfilingFilter.java:16)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:178)
        at com.atlassian.jira.web.filters.ActionCleanupDelayFilter.doFilter(ActionCleanupDelayFilter.java:41)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:21