Upgrade Jira 4.2 to 5.2 - admin can not login

Upgraded 4.2.1 to 5.2.
Upgrade goes smoothly, have practiced to 5.1.7 a month ago.

My normal cword-user can log in.
A admin user fails with exception in browser and logs.

2012-11-19 20:26:12,047 http-bio-8080-exec-17 ERROR [500ErrorPage.jsp] Exception caught in 500 page org.apache.jasper.JasperException: An exception occurred processing JSP page /includes/decorators/aui-layout/head-common.jsp at line 48

45: Map<String, Object> context = DefaultWebFragmentContext.get("atl.header");
46: List<WebPanel> displayableWebPanels = headWebInterfaceManager.getDisplayableWebPanels("atl.header", context);
47: for (WebPanel webPanel : displayableWebPanels)

{%> 48: <%=webPanel.getHtml(context)%> 49: <%}

50: %>
51: <%-<meta http-equiv="Pragma" content="no-cache" />-%>

Stacktrace:
java.lang.RuntimeException: org.apache.jasper.JasperException: An exception occurred processing JSP page /includes/decorators/aui-layout/head-common.jsp at line 48

45: Map<String, Object> context = DefaultWebFragmentContext.get("atl.header");
46: List<WebPanel> displayableWebPanels = headWebInterfaceManager.getDisplayableWebPanels("atl.header", context);
47: for (WebPanel webPanel : displayableWebPanels)

{%> 48: <%=webPanel.getHtml(context)%> 49: <%}

50: %>
51: <%-<meta http-equiv="Pragma" content="no-cache" />-%>

Stacktrace:
at com.opensymphony.sitemesh.webapp.decorator.BaseWebAppDecorator.render(BaseWebAppDecorator.java:39)
at com.opensymphony.sitemesh.webapp.SiteMeshFilter.doFilter(SiteMeshFilter.java:84)
at com.atlassian.jira.web.filters.SitemeshPageFilter.doFilter(SitemeshPageFilter.java:124)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)
at com.atlassian.labs.remoteapps.modules.permissions.ApiScopingFilter.doFilter(ApiScopingFilter.java:60)
at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)
at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)