Index: e-calendar-view.c
===================================================================
RCS file: /cvs/gnome/evolution/calendar/gui/e-calendar-view.c,v
retrieving revision 1.122
diff -u -p -r1.122 e-calendar-view.c
--- e-calendar-view.c	4 May 2006 15:14:24 -0000	1.122
+++ e-calendar-view.c	8 May 2006 17:20:43 -0000
@@ -2136,6 +2136,8 @@ e_calendar_view_get_tooltips (ECalendarV
 		gtk_widget_destroy (widget);
 
 	pevent = data->get_view_event (data->cal_view, data->day, data->event_num);
+	if (!pevent || !pevent->comp_data)
+		return FALSE;
 
 	clone_comp = icalcomponent_new_clone (pevent->comp_data->icalcomp);
 	if (!e_cal_component_set_icalcomponent (newcomp, clone_comp))
