There are very few problems, but obviously (OK not obviously I know that, but I can assure you...) I have checked everything to ensure that I have installed the hack perfectly. No errors in my file hacks or template files.
It just seems like a sort of "time out" that gives people the "No Permission" screen. As I said, the arcade is great, and a lot of people on my site seem to use it, but that's causing a bigger headache with this issue that the "hardcore" high score group keep running in to.
www.mini2.com/forum/arcade.php
It's only happened to me once, but that's enough to know it's real.