Hi, I'm fairly new to Nginx (an Apache convert) and have run into an issue where my site works, but one particular POST function fails with "No Input File Specified." The POST is a port of an old IPBv2 script to submit scores into a database via the URL: http://www.example.com/game/123/index.php?act=Arcade&do=newscore

I have verified permissions

In Apache, the RewriteRule was:
RewriteRule ^game/(.*)/(.*)\.php$ index.php?act=Arcade&do=newscore [L]

In nginx, I have:
rewrite ^/game/(.*)/(.*)\.php$ /index.php?act=Arcade&do=newscore last;

Here's my site's .conf (some info masked). Can anyone help point me in a direction? I'm not sure what I'm missing and I've spent a solid 12 hours on it, so would greatly appreciate any help.

server {
listen 80;
server_name www.example.com;
root /var/www/example;
location / {
try_files $uri $uri/ @gss;
}
location ~ \.php$ {
try_files $uri /index.php?$args =404;
if ($uri !~ "^/uploads/") {
fastcgi_pass unix:/var/run/php-fcgi.pid;
}
location ~ /arcade/gamedata/(.*)$ {
alias /var/www/example/arcade/gamedata/$1;
internal;
break;
}
location @gss {
#Rewrite the games
rewrite ^/game/(.*)/(.*)\.php$ /index.php?act=Arcade&do=newscore last;
rewrite ^/play/index.php$ /index.php?act=Arcade&do=newscore last;
rewrite ^/game/(.*)/arcade/(.*)$ /arcade/$2 last;
rewrite ^/play/arcade/(.*)$ /arcade/$1 last;
rewrite ^/(.*).html$ /index.php?params=$1 last;
}
}