diff -up evolution-2.91.0/calendar/gui/e-day-view.c.im-context-reset evolution-2.91.0/calendar/gui/e-day-view.c
--- evolution-2.91.0/calendar/gui/e-day-view.c.im-context-reset	2010-10-03 18:36:41.000000000 +0200
+++ evolution-2.91.0/calendar/gui/e-day-view.c	2010-10-11 11:24:30.000000000 +0200
@@ -6183,6 +6183,9 @@ e_day_view_start_editing_event (EDayView
 	if (!event->canvas_item)
 		return;
 
+	/* Reset IM context. */
+	gtk_im_context_reset (E_TEXT (event->canvas_item)->im_context);
+
 	/* We must grab the focus before setting the initial text, since
 	   grabbing the focus will result in a call to
 	   e_day_view_on_editing_started (), which will reset the text to get