PHP & URL Question - omitting index.php

Quick question on passing arguments via URL. Does anyone know if any browsers have a hard time dealing with something like the following? http://www.blahbalh.com/directory/?arg1=arg1&arg2=arg2 In this case the "directory" would have an index.php file that would react based on the query string, but as you can see I'm not including the index.php in the link. Is this o.k. or will some browsers get confused? thanks in advance colin olkowski