Lord_Majestic - 2:43 pm on Aug 10, 2004 (gmt 0)

On average (over 3 popular websites) I find about 50% of logs have an empty referrer.

I've come across with an interesting "feature" of IT, which is not to set referer for windows opened by JavaScript (Netscape at the time of testing was fine, not sure about Mozilla). Can't be arsed to test now if <a href="url" target=_new> would also reset referrer, but I think it won't.

And why does referer anyway? Proper tracking system would contain right codes as part of URL, so that referrer by itself won't matter - your tracking code is the reference of source that referred click to you.