Magento – Customer registration problem. Page reload after submit

It was an NGINX configuration issue... {surprise, surprise}.

This config file work on Ubuntu 14.04 LTS in a development environment. Don't forget to set the server_name and root variables for your environment.

NGINX.CONF

user              www-data;
worker_processes  1;
error_log         /var/log/nginx/error.log;
pid               /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request "'
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    autoindex off;
    map $scheme $fastcgi_https { ## Detect when HTTPS is used
        default off;
        https on;
    }

    keepalive_timeout  10;

    gzip  on;
    gzip_comp_level 2;
    gzip_proxied any;
    gzip_types      text/plain text/html text/css application/x-javascript
text/xml application/xml application/xml+rss text/ja$

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;

}

VHOST.CONFIG

server {
    listen 80;
    server_name YOURDOMAIN.com;  #<--- edit this
    rewrite / $scheme://dev.$host$request_uri permanent;
}

server {
    listen 80 default;
## SSL directives might go here
    server_name SUBDOMAIN.DOMAIN.com;  #<---edit this too.
    root /usr/share/nginx/magento;

    location / {
        index index.html index.php; ## Allow a static html file to be shown first
        try_files $uri $uri/ @handler; ## If missing pass the URI to Magento's front handler
        expires 30d; ## Assume all files are cachable
    }

    ## These locations would be hidden by .htaccess normally
    location ^~ /app/                { deny all; }
    location ^~ /includes/           { deny all; }
    location ^~ /lib/                { deny all; }
    location ^~ /media/downloadable/ { deny all; }
    location ^~ /pkginfo/            { deny all; }
    location ^~ /report/config.xml   { deny all; }
    location ^~ /var/                { deny all; }

    location /var/export/ { ## Allow admins only to view export folder
        auth_basic           "Restricted"; ## Message shown in login window
        auth_basic_user_file htpasswd; ## See /etc/nginx/htpassword
        autoindex            on;
    }

    location  /. { ## Disable .htaccess and other hidden files
        return 404;
    }

    location @handler { ## Magento uses a common front handler
        rewrite / /index.php;
    }

    location ~ .php/ { ## Forward paths like /js/index.php/x.js to relevant handler
        rewrite ^(.*.php)/ $1 last;
    }

    location ~ .php$ { ## Execute PHP scripts
        ## Catch 404s that try_files miss
        if (!-e $request_filename) { rewrite / /index.php last; }
        expires        off; ## Do not cache dynamic content
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_param  HTTPS $fastcgi_https;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        fastcgi_param  MAGE_RUN_CODE default;
        fastcgi_param  MAGE_RUN_TYPE store;
        include        fastcgi_params; ## See /etc/nginx/fastcgi_params
    }
}