Error viewing the activity stream

Hello,

we getting a stacktrace while viewing the activity stream:

2010-02-11 16:01:45,078 http-8081-Processor7 ERROR ben 57705x1297x1 1i0s57y /plugins/servlet/streams [atlassian.streams.servlet.StreamsActivityServlet] Error getting activity
java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:417)
at java.lang.Integer.parseInt(Integer.java:499)
at com.atlassian.streams.jira.JiraSyndEntryFactoryImpl.buildStatusChange(JiraSyndEntryFactoryImpl.java:414)
at com.atlassian.streams.jira.JiraSyndEntryFactoryImpl.buildChanged(JiraSyndEntryFactoryImpl.java:189)
at com.atlassian.streams.jira.JiraSyndEntryFactoryImpl.getSyndEntries(JiraSyndEntryFactoryImpl.java:118)
at com.atlassian.streams.jira.JiraStreamsActivityProvider.getActivityFeed(JiraStreamsActivityProvider.java:113)
at com.atlassian.streams.servlet.StreamsActivityServlet$1.doInTransaction(StreamsActivityServlet.java:118)
at com.atlassian.sal.core.transaction.HostContextTransactionTemplate$1.doInTransaction(HostContextTransactionTemplate.java:25)
at com.atlassian.jira.DefaultHostContextAccessor.doInTransaction(DefaultHostContextAccessor.java:34)

Any fix for that? We are having customers seeing this problem on our jira, so its crtitical for us.