Reverse a string while maintaining the capitalization in the same places

lambda s:''.join((z*2).title()[c.isupper()-1]for c,z in zip(s,s[::-1]))

Try it online

-3 bytes from Ruud, plus the inspiration for 2 more.

-4 more bytes from FryAmTheEggman

This solution is from @Ton Hospel (13 bytes shorter thant mine).

s%.%(lc$&gt$&?u:l)."c chop"%eeg

But you'll need l and p switches on. To run it :

perl -lpe 's%.%(lc$&gt$&?u:l)."c chop"%eeg'

Python 2, 73 bytes

Since the rules specify the input is ascii:

lambda s:''.join([z.lower,z.upper]['@'<c<'[']()for c,z in zip(s,s[::-1]))

All the credit goes to @Mego though, but I had not the reputation to just comment on his answer.