- If you added a slash to the end of the url when requesting backend.php or frontend_dev.php or similar caused the page not be found, even though under Apache this works fine and goes to the correct place. Which seemed to be caused by the script_name server param.
- GET parameters were not getting passed to Symfony. Caused by the arguments been removed during the try_files request.
So I modified the example config to produce the following, which as far as I can tell works exactly the same as the default .htaccess file does under Apache.