Web Proxy Checker Pro 1.7.4 released
Download Web Proxy Checker NowImprovements/Bugfixes
[+] You can configure URL of web service that used to resolve the IP address of reverse proxy.
By default (if no Resolve IP URL specified) Web Proxy Checker uses http://www.whatismyip.com/automation/n09230945.asp.
Now You can use any web service, that returns the IP address of the sender. For example, this: http://optinsoft.x10hosting.com/getip.php (also, you can find some other useful services on http://optinsoft.x10hosting.com/).