There are three command-line utilities that are distributed as part of the Perl HTTP library: GET, HEAD, and POST. These are for performing the HTTP operations of those names from the command line.

But there's also a POSIX-standard utility for extracting the first few lines of a text file. It's called head.

I think you see where I'm going with this. HEAD and head are the same name in a case-insensitive filesystem such as the classic Mac filesystem. They are different names on a Unix-style filesystem.

Installing /usr/bin/HEAD from libwww-perl onto a Mac with the classic filesystem overwrote /usr/bin/head and broke various things.

[–] Jessica@discuss.tchncs.de 10 points 2 months ago

Hey I have one of these case sensitive Mac OS X stories as well!

I gave it a try one time, and I found out the hard way some developers don't test everything in a case sensitive environment. I don't remember what specifically went wrong, but Adium, The instant messaging client, blew up because it couldn't find certain files on the local hard drive.

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