MacOS X Finder reveals contents of Apache Web directories

Summary
MacOS X creates a hidden file, '.DS_Store' in each directory that has been viewed with the 'Finder'. This file contains a list of the contents of the directory, giving an attacker information on the structure and contents of your website.
Solution
Use a <FilesMatch> directive in httpd.conf to forbid retrieval of this file: <FilesMatch '^\.[Dd][Ss]_[Ss]'> Order allow, deny Deny from all </FilesMatch> and restart Apache.