The seriously insensitive character comparison you're looking for is NFKC normalization (see http://en.wikipedia.org/wiki/Unicode_equivalence http://en.wikipedi

The seriously insensitive character comparison you're looking for is NFKC normalization (see http://en.wikipedia.org/wiki/Unicode_equivalence http://en.wikipedia.org/wiki/Unicode_equivalence). You would probably be able to normalize all your strings before putting them into your database. You'd lose no functionality unless at some point later you really did need to distinguish "C" from "Ｃ".