Full content search throws non-fatal exceptions

If having made a search, I click on 'Full Content', the search works but I get lots of these exceptions in the log:

2003-09-22 16:25:33,483 ERROR [webwork.util.ServletValueStack] METHOD: "hasIssuePermission", exception:
java.lang.NullPointerException
at webwork.util.ValueStack.findMethod(ValueStack.java:743)
at webwork.util.ValueStack.findValue(ValueStack.java:382)

at webwork.expr.Parser.findValue(Parser.java:332)
at webwork.expr.Parser.comparative_expression(Parser.java:224)
at webwork.expr.Parser.logical_and_expression(Parser.java:173)
at webwork.expr.Parser.test(Parser.java:143)
at webwork.util.ValueStack.test(ValueStack.java:131)
at webwork.view.taglib.IfTag.doStartTag(IfTag.java:38)
at includes._panels._issue_0commentsjsp._jspService(_issue_0comments_jsp.java:185)
at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
at com.caucho.jsp.Page.subservice(Page.java:497)
at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
at com.caucho.server.http.Invocation.service(Invocation.java:315)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at com.caucho.server.http.QRequestDispatcher.include(QRequestDispatcher.java:369)
at com.caucho.server.http.QRequestDispatcher.include(QRequestDispatcher.java:276)
at com.caucho.jsp.QPageContext.include(QPageContext.java:538)
at secure._views._navigator._navigator_22dfulljsp._jspService(_navigator_22dfull_jsp.java:642)
at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
at com.caucho.jsp.Page.subservice(Page.java:497)
at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
at com.caucho.server.http.Invocation.service(Invocation.java:315)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:115)
at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:225)
at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:106)
at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:83)
at webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:213)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:103)
at com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServlet.java:96)
at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:129)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:61)
at com.atlassian.jira.web.filters.SitemeshExcludePathFilter.doFilter(SitemeshExcludePathFilter.java:39)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:161)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.seraph.filter.LoginFilter.doFilter(LoginFilter.java:181)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:132)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.jira.web.filters.AppConsistencyFilter.doFilter(AppConsistencyFilter.java:92)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.jira.web.filters.EncodingFilter.doFilter(EncodingFilter.java:53)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.caucho.server.http.Invocation.service(Invocation.java:315)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:246)
at com.caucho.server.http.HttpRequest.handleConnection(HttpRequest.java:164)
at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
at java.lang.Thread.run(Thread.java:534)