or did you miss words out, like;
?There was a problem communicating with the web proxy server (HTTP).? (CFURLErrorDomain:306)
If that is the full error, then it looks like your browsers are attempting to connect to the internet through a proxy server.
Try this, open Internet Options from the Control Panel. Goto the Connections tab and then click the LAN Settings button. If anything is entered under "Proxy server", remove them. Leave everything else blank or not selected. Click OK/Apply/OK, then try Internet Explorer again. If it works, may be the other browsers will as well. If not, check their options for any Proxy connection settings.
Get the message CFURLErrorDomain:306 when I try to load any of the mentioned browsers. I run Win XP on an HP Pavillion. HELP!!!! How can I correct this??? I had a virus and when I removed it and supposedly had everything fixed this is what I got.