If you get a message like this and you are sure that your mod_rewrite rules are OK:
Tue Jun 10 11:18:59 2008] [error] [client 192.168.1.85] Options FollowSymLinks or SymLinksIfOwnerMatch is off which implies that RewriteRule directive is forbidden: /var/www/enterprise/file.html
You need to enable FollowSymLinks in the directory that uses mod_rewrite, if not, you will get a friendly 403 error message :)
<Directory /path/of/your/dir>
Options -All
Options +FollowSymLinks
</Directory>
To enable globally, use httpd.conf with
<Directory /> Options +FollowSymLinks </Directory>
See you!