Whenever I try to post a form from a controller other than to any url other than '/' I get a 403 error (in Fiddler or Firebug) and then the $_POST array is empty. So for example the url I'm trying to post to is '/admin/', but the $_POST array is always empty unless I post the form to '/' or to an actual filename. I can't imagine that I'm the only person who's ever run into this issue. Please help!!!

Here's my .htaccess file:

RewriteEngine On
RewriteBase /
Options +FollowSymLinks

RewriteCond %{REQUEST_FILENAME}% !-f
RewriteRule !\.(js|ico|gif|jpg|png|css)$ index.php