How to stop / hijack a infinite redirection loop with a redirecting rule I'm using Rules and Detector module to prevent IE &lt; 7.0 users from browsing the site.

I've setted up a rule, executed when UA (Detector) properties are loaded. Dependings on user agent value, the rule have an action, which consists in redirecting user to a particuler node (explanation).

This works well, so well that redirection is always active, even on my destination node. So it lead me to kind of 'Too much redirection error'.

I don't manage to put another condition, like Path has url alias; that will prevent all undesired redirections. 

Do you know what I'm doing wrong?
Please, don't hesitate to suggest me another way to achieve this redirection properly.
You might want to consider a simple redirect in .htaccess

To redirect based on user agent, if not already on redirected page.

RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} MSIE [1-7]
RewriteCond %{REQUEST_URI} !^/upgrade/
RewriteRule .? upgrade [L]