case sensitivity in 'find file'?

[Viktor Haag <vhaag@rim.com>]

I'm using Emacs 21.3.50.1 built on Mac OSX through the Fink
project with the tarball 'emacs-21.3.50-20040617.tar.gz'.

I've seen new behaviour that I don't like; when I use 'find-file'
the completion now seems to be case-insensitive. I find this
annoying as it now sees ~/Library and ~/lib as similar requiring
more keystrokes when finding a file in the ~/lib subtree.

There must be a way to retrieve the old case-sensitive behaviour
so that ~/Lib and ~/lib are matched as different names.

Can some kind soul please let me know where the variables are
that control this behaviour?

-- 
Viktor Haag : Software & Information Design : Research In Motion
                              +--+
 Disclaimer mandated by employer: "This transmission may contain
confidential or privileged material. Any use of this information
by anyone other than the intended recipient is prohibited. If you
  have received this transmission in error, please immediately
    reply to the sender and delete this information from your
system. Use, dissemination, distribution, or reproduction of this
 transmission by unintended recipients is not authorized and may
                          be unlawful."