Routing URLs and trailing slashes

did you try this?

Code:

RewriteRule ^(.*[^/])$ index.php?/$1/ [L]

... or rather this:

Code:

RewriteRule ^(.*)/?$ index.php?/$1/ [L]

Your rule would rejected requests that have a trailing slash.

Edit:

Actually, the OP's goal seems to be indeed to reject such requests. However, 'foo' being redirected to 'foo/' is not the same as both of them just returning the same content. Search engines should understand redirects and still only track 'foo/'.