Facebook.com blocked by OpenDNS network, why?

facebook.com is the biggest social networking was blocked by OpenDNS... (-__-" i dont know why..

So, if You can't open facebook.com with OpenDNS IP, You must change the IP first with another DNS IP or keep Your DNS IP blank. Yups that's all, I just found this when i want to open my facebook page with OpenDNS IP. Will be update if any something new to explain this "case"