Case Sensitivity in xorg.conf

[Hanumizzle]

I will be writing a Parse::RecDescent grammar for xorg.conf files, but
hit a critical stumbling block: I am not sure *exactly* which parts of
the file are case-sensitive, although a brief rundown of the source and
documentation suggests that most aren't. Arguments to Load and
filenames, as with FontPath (this is on Linux) are obviously sensitive
to case; is there anything else I missed??

Cheers,
hanu