from comment on http://httpd.apache.org/docs/2.2/rewrite/remapping.html
if you enter :
	<Directory /var/www/my_blog>
	FallbackResource index.php
	</Directory>

	into your vhosts file and then try to access :
	example.com/welcome/to/me/page
	you may get a 'Request exceeded the limit of 10 subrequest nesting levels'
	(Apache/2.2.16 (Debian))
	To avoid this problem enter a '/' at the start of index.php to give you :

	<Directory /var/www/my_blog>
	FallbackResource /index.php
	</Directory>