I recently came across teh Enable Referers problem when I installed WordPress last week. I found out it was ZoneAlarm that was blocking the referrer.
Now the crux is, this is the free edition not the "pro" edition (which WordPress Codex helpfully has instructions), so I am at a lost how to enable referrers or even find where the "Privacy" options are. The only way I can gain access is to unload Zone Alarm!!!
Has anyone found a better work around?
P.S. I had a quick look at the Zone Alarm website and all it refers to is the "Pro" edition of its product.