_save_event contains an apparent typo in the end date validation, 
testing the event start day to determine if it is greater than 0,
rather than the event end day.

----

--- Scoop/Calendar/Events.pm.orig	2007-10-30 01:49:33.000000000 -0600
+++ Scoop/Calendar/Events.pm	2007-10-30 01:49:53.000000000 -0600
@@ -451,7 +451,7 @@
 		$msg .= "<BR>Event must have a start date\n";
 	}
 
-	if ( $S->cgi->param('date_end') && $S->cgi->param('date_end_year') > 0 && $S->cgi->param('date_end_month') > 0 && $S->cgi->param('date_start_day') > 0 ) {
+	if ( $S->cgi->param('date_end') && $S->cgi->param('date_end_year') > 0 && $S->cgi->param('date_end_month') > 0 && $S->cgi->param('date_end_day') > 0 ) {
 		my $tmp2 = $S->cgi->param('date_end_year') . "-" . $S->cgi->param('date_end_month') . "-" . $S->cgi->param('date_end_day');
 		warn " (_save_event) checking end date $tmp2" if $DEBUG;
 		if ( Date::Calc::check_date($S->cgi->param("date_end_year"),$S->cgi->param("date_end_month"),$S->cgi->param("date_end_day")) ) {