Continuity mistake: When Alice returns to the caterpillar and he says "keep your temper" he is coloured opposite to how he normally looks, with a dark blue front and light blue back. (00:34:15)
Revealing mistake: The Germans burn the whole village and deport the natives...who don't seem all that concerned. You can spot some being rather casual about it, and smile as they get herded away - like the woman in the blue dress. (00:12:40)