NullPointerException in com.atlassian.fisheye.activity.ActivityItemSearchParams.generateChangelogParams

From a customer log:

10:35:20 WARN - Exception encountered while retrieving activity items:
java.lang.NullPointerException
at com.atlassian.fisheye.activity.ActivityItemSearchParams.generateChangelogParams(ActivityItemSearchParams.java:259)
at com.atlassian.crucible.activity.changeset.ChangesetCommentActivityItemProvider.getMoreActivityItems(ChangesetCommentActivityItemProvider.java:64)
at com.atlassian.crucible.activity.review.CoalescingActivityItemProviderBase.findActivityItemsAndCoalesce(CoalescingActivityItemProviderBase.java:27)
at com.atlassian.crucible.activity.review.CoalescingActivityItemProviderBase.findActivityItems(CoalescingActivityItemProviderBase.java:60)
at com.atlassian.fisheye.activity.DefaultActivityItemManager.findActivityItems(DefaultActivityItemManager.java:49)
at com.atlassian.fisheye.activity.ActivityStreamHandler.handleActivityStream(ActivityStreamHandler.java:157)
at com.cenqua.fisheye.web.ProjectPageAction.getActivityHandler(ProjectPageAction.java:334)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at javax.el.BeanELResolver.getValue(BeanELResolver.java:293)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:175)
at com.sun.el.parser.AstValue.getValue(AstValue.java:138)
at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:206)
at org.apache.jasper.runtime.PageContextImpl.evaluateExpression(PageContextImpl.java:1001)
at org.apache.jsp.WEB_002dINF.jsp.project_jsp._jspx_meth_c_set_0(project_jsp.java:202)
at org.apache.jsp.WEB_002dINF.jsp.project_jsp._jspService(project_jsp.java:150)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:109)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1208)
at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:55)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:41)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1200)
at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:55)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:41)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1200)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:70)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1200)
at com.cenqua.crucible.filters.CrucibleFilter.doFilter(CrucibleFilter.java:141)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1200)
at com.cenqua.fisheye.web.filters.TotalityFilter.doFilter(TotalityFilter.java:181)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:236)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1200)
at com.atlassian.security.auth.trustedapps.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:98)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:236)