I just downloaded the new ZoneAlarm Pro 3.0 and had a problem Posting Information to some sites. I would get the following error: "The host you are trying to send the input from is not a valid host." The Fix: 1) Open up the ZoneAlarm Program. 2) Click on "Privacy". 3) Under the Cookie Control Section, Click on the "Custom" button. 4) Under the Cookies Tab, 3rd Party Cookies, uncheck the "Remove private header information" box. Leave "Block 3rd party cookies" and "Disable web bugs" boxes checked. 5) Click Apply.