Jiraissue seemingly broken in Confluence 2.9.1

2008-09-10 16:54:15,027 INFO  [STDOUT] 2008-09-10 16:54:15,026 ERROR [DefaultQuartzScheduler_Worker-8] [atlassian.confluence.links.ReferralTaskQueue] flush Unable to add referrer http://raven/kb/display/yaqas/JiraIssues+example - null
java.lang.NullPointerException
	at java.lang.String.startsWith(String.java:1422)
	at java.lang.String.startsWith(String.java:1451)
	at com.atlassian.confluence.links.DefaultReferralManager.isReferringRequest(DefaultReferralManager.java:168)
	at com.atlassian.confluence.links.DefaultReferralManager.referToContent(DefaultReferralManager.java:157)
	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 org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at com.atlassian.spring.interceptors.SpringProfilingInterceptor.invoke(SpringProfilingInterceptor.java:20)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
	at $Proxy114.referToContent(Unknown Source)
	at com.atlassian.confluence.links.ReferralTask.execute(ReferralTask.java:27)
	at com.atlassian.confluence.links.ReferralTaskQueue.flush(ReferralTaskQueue.java:69)
	at com.atlassian.confluence.event.jobs.ReferralQueueFlushJob.doExecute(ReferralQueueFlushJob.java:25)
	at com.atlassian.quartz.jobs.AbstractJob.executeInternal(AbstractJob.java:87)
	at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
	at com.atlassian.confluence.setup.quartz.DelegatingClusterAwareQuartzJobBean.executeJob(DelegatingClusterAwareQuartzJobBean.java:16)
	at com.atlassian.confluence.setup.quartz.AbstractClusterAwareQuartzJobBean.surroundJobExecutionWithLogging(AbstractClusterAwareQuartzJobBean.java:64)
	at com.atlassian.confluence.setup.quartz.AbstractClusterAwareQuartzJobBean.executeInternal(AbstractClusterAwareQuartzJobBean.java:47)
	at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
	at org.quartz.core.JobRunShell.run(JobRunShell.java:203)
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)