Since using www.dnsleaktest.com I have found that any VPN service using Open VPN will leak my DNS through the tunnel.
I have tried and tested several VPN providers, even those who say that they have a solution to the DNS leak problem, such as Mulvad for example, and they all leak. In addition to dnsleaktest.com, I have confirmed the DNS leak though my email provider, which logs the IP address when logging on. Even with a VPN my actual IP will be logged. All those what's your-ip type of sites say that my IP is coming from the VPN server when it is not. I have also tried to fix the leak with a patch script which is downloaded from a link from the dnsleaktest website and have found that this does not work to stop the leak. I have manually configured a remote DNS resolver in Romania through the properties menu in the adapter settings in Windows 7 but still have the leak.
Only two things I have found to not leak. One is Ultrasurf (which I have to manually configure in the browser
127.0.0.1:9666) and the proxy which is built into Epic privacy browser. Unfortunately these are proxies and not VPN tunnels so the servers will be generating logs, but at least my ISP is now blind and if anyone wants to know my surfing habits they will have to take up the task of getting into the proxy server logs. So I have stopped using my paid VPN service and use the proxies because my DNS does not leak from them.
I would very much like to know if anyone has noticed the leak problem with Open VPN and found a solution to the leak.