Endora remarked that she was at the Louvre over 900 years ago when "they laid the cornerstone". That contradicts her statement in "How Not to Lose Your Head to Henry VIII: Part 1" when she said she wasn't alive in the 16th Century.
During Maurice's tirade, the damage to the mirror changes from the first to second shot.
The headline in French, in the French newspaper, has the verb "escaled", in English. There is no such word in French---and past participles do not end in "ed", in French.
The headline in the newspaper M. Sagan shows Darrin is written in garbled - misspelled and highly ungrammatical - French: unlikely for a Parisian publication.