-> See also the reviews of "Kindle-customer", "Elli", "Kurt Hohenester" and "Gabriele Aldag" plus associated comments !!
Problem Googled: Lo and behold! Two more hits (one in 2009). The Spie stuff slips in the calendar and there are always empty door ?! If not behind another door are two parts, I'll cut the calendar after 24!
So I really do not forgive often a star, but that Playmobil not get this problem under control, is an absolute "No Go" !!