When the iCal feed is enabled on the calendar, many suspended workflows are generated. There appears to be some malformed date business in the log:
2008/06/13 01:00:27 - ERROR - www.knowmad.com.conf - main::[[undef]] - Couldn't execute operation : WebGUI::Operation::Workflow::www_runWorkflow. Root cause: The 'hour' parameter (undef) to DateTime::new was an 'undef', which is not one of the allowed types: scalar at /data/WebGUI/lib/WebGUI/Workflow/Activity/CalendarUpdateFeeds.pm line 5002008/06/13 01:00:27 - ERROR - spectre.conf - POE::Kernel::_dispatch_event[1012] - WORKFLOW: Something bad happened on the return of www.knowmad.com - -oUpUgGmjyRbPXEXX6D9Ww. <HTML><HEAD><TITLE>An Error Occurred</TITLE></HEAD><BODY><H1>An Error Occurred</H1>200 OK</BODY></HTML>
Is this happenning with all feeds? If not, do you have an example feed showing this problem?
We need more information. If you could attach the ICalendar feed that you are subscribing to that is causing this issue we can work it out.
Until then, closing this.