Apache :: Excessive Internal Redirects Error

What was causing this:

I installed a url shortner script but the link that the script creates takes you to a server error page.

I viewed the logs and I get this error over and over again.

Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.

this is what is in my htaccess file

RewriteEngine On

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-l

RewriteRule ^(.+)$ index.php?url=$1 [QSA,L]