ClassCastException in Time tracking report if no issues found

If you choose a time tracking report where no issues are found - a classcastexception occurs.

2003-08-28 11:52:27,562 ERROR [webwork.dispatcher.ServletDispatcher] Could not execute action
java.lang.ClassCastException
at com.atlassian.jira.web.action.browser.TimeTrackingReport.retrReportIssues(TimeTrackingReport.java:151)
at com.atlassian.jira.web.action.browser.TimeTrackingReport.doExecute(TimeTrackingReport.java:104)
at webwork.action.ActionSupport.execute(ActionSupport.java:154)
at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:44)