I use mod_rewrite/.htaccess for pretty URLs.
I\'m using this condition/rule to eliminate trailing slashes (or rather: rewrite to the non-trailing-slash-URL, by a 301
If you only want to remove the trailing slashes from GET requests, use the below:
RewriteCond %{REQUEST_METHOD} =GET RewriteRule ^(.*)/$ /$1 [L,R=301]