CocoCami

Corrected entry: Christian is supposed to spend one semester at one parent's place in Chicago, one semester in Beverly Hills. It's clear that the movie takes place over a school year (meaning not one spring semester to the following fall): they are shown constantly as being in classes and at school (and no mention is made that it might be summer school), there are no plotlines involving summer vacation, etc. So the "other semester," when Christian comes back, has to be the winter (aka spring), not the fall. But the day (and other immediately following) he comes back to school, everyone is wearing summer-like outfits: little jackets, short sleeves, lots of exposed skin (not just Cher, who has her reasons for wearing skimpy clothes). Since the movie is filmed and set in Los Angeles, everyone writing the film would know that, contrary to popular belief, it does actually get cold in Los Angeles in the winter. January and February's average lows are 49 degrees; no way all those kids would be dressed that skimpily with the temps in the 40s and 50s.

Corrected entry: When they are in the club, after Ty falls down the stairs, she ties her overshirt around her waist, in the next shot she isn't wearing it at all, then in the next shot she is wearing it over her shoulders, and a minute later it is back around her waist.