Explicitly, yeah, but any associative array using
title strings as
keys will automatically be case-sensitive, just because array lookups
(and string comparisons generally) are case-sensitive. I have no idea
how many of those there are scattered about.
Is there many of them - such things? The only one I found was LinkCache
class.
Parser, Linker, Title use only methods of LinkCache, when it's about
Good|BadLinks.
Maybe there are no other cases of use title string as keys of associative
array?