Well, what about your /etc/hosts file, does it contain anything that should not be there?
127.0.0.1 RM696 localhost 127.0.0.1 adition.com 127.0.0.1 affili.net 127.0.0.1 chat.ovi.com 127.0.0.1 code.google.com 127.0.0.1 doubleclick.net 127.0.0.1 facebook.com 127.0.0.1 gmail.com 127.0.0.1 google-analytics.com 127.0.0.1 google.com 127.0.0.1 googleadservices.com 127.0.0.1 googleapis.com 127.0.0.1 googlemail.com 127.0.0.1 googlesyndication.com 127.0.0.1 googletagservices.com 127.0.0.1 googleusercontent.com 127.0.0.1 gstatic.com 127.0.0.1 m.facebook.com 127.0.0.1 play.google.com 127.0.0.1 plus.google.com 127.0.0.1 rackspace.com 127.0.0.1 sites.google.com 127.0.0.1 supl.google.com 127.0.0.1 talkgadget.google.com 127.0.0.1 tradedoubler.com 127.0.0.1 urlfixer.org 127.0.0.1 webmasterplan.com 127.0.0.1 www.facebook.com 127.0.0.1 www.google.com 127.0.0.1 yieldkit.com