--- calendar/gui/e-meeting-store.c-orig	2009-04-20 16:00:27.249149378 +0200
+++ calendar/gui/e-meeting-store.c	2009-04-20 15:59:39.554148338 +0200
@@ -1175,7 +1175,7 @@
 	default_fb_uri = g_strdup (fbd->fb_uri);
 	fburi = g_strdup (e_meeting_attendee_get_fburi (attendee));
 
-	if (fburi) {
+	if (fburi && !g_str_equal (fburi, "")) {
 		priv->num_queries++;
 		gnome_vfs_async_open (&handle, fburi, GNOME_VFS_OPEN_READ,
 				      GNOME_VFS_PRIORITY_DEFAULT, start_async_read,
