Outfit changing?! ***SPOILERS***
I don't know if anyone has yet noticed (and perhaps it is not of a great importance, I just thought it a bit odd) but when Kate "jumps forward" to her past, her dress changes. There is black lace (or something) being added on the cleavage and I don't seem to remember this big ribbon-like thing at the back being there before. When Leopold lands into the future however, nothing seems to respectively change on his clothes....
As I said, not too important, but got me wondering about its possible meaning in the film.