i believe that

$route[’product/:any’] = “catalog/product_lookup”;

should become

$route[’product/(:any)’] = “catalog/product_lookup/$1”;

... this is the only way that i can make it work anyway, please correct me if im wrong though

That’s what the example right underneath is for.  It’s there to show what can be done, some people may not need to capture the trailing segments.

i stumbled on this same thing a few months back. here is the link to my writeup of this bug/inconsistency in the manual (or the code - take your pick).

cheers.