Two things I never noticed as a kid:
1. The Godfather references. They're the most entertaining part of the film to me now.
2. At the end wedding scene, Chaz says to Kira, "Careful, the knife is very sharp." As a kid, I asked my parents why he would need to point it out, and they explained that it was because she was from a different culture and probably wasn't used to using knives.
Then I thought, wait a minute, the French and Japanese both make heavy use of knives within their cooking. Of course she would know it was sharp! What a weird line to put in there.
Okay, there's a lot of other ridiculous shit that happens in this movie (a group of babies destroying half of Paris, for example), but that threw me off the most.
Claire's A Film A Day, 2014: Day 192