Hi. When I followed the instructions on http://en.support.wordpress.com/widgets/upcoming-events/ page to insert the [upcomingevents url="ICALENDARFEEDURL"] shortcode into my post, it resulted in a "No Upcoming Results" message, although sidebar widget worked fine. After a while I discovered it worked when I pasted the shortcode in text view. Thus two issues may affect noobs like me: (1) The error(?) message displayed is not helpful when the code has been incorrectly pasted; (2) (imho) the "Upcoming Events" support page would be more helpful if it specified the code must be pasted in when in text view.
The blog I need help with is southdownhill.wordpress.com.