I was looking at my stats and I saw a couple visitors that had a "BlockedReferrer" as their Referring URL. What does that mean? Thanks.
It means they have blocked their referrer information, usually for privacy reasons, and substituted that text. Some software will do this automatically, but you can also alter settings yourself, such as in Firefox. I personally have FF set to send no referrer, IIRC you can do this in the config file. It's nothing to be unduly concerned about when you find something like this in your stats.