digitalv - 4:15 am on Aug 10, 2004 (gmt 0)

the referrer string is empty ie no trackable referrer.

Many people either block the referring document through software (like Norton Internet Security, McAfee, a couple of Firefox plugins, etc.) and many others are surfing through anonymous proxies that do this automatically. Basing your tracking on the referring document is unreliable. I suggest you use a Tracking URL for your advertising sources. Rather than have your advertisements link to www.example.com have them link to www.example.com/?track=source

Then all you have to do is look in your logs for how many hits there were to /?track=whatever and you'll know how many clicks were delivered - you can ignore the referrer completely.

I can't think of a single thing to do when my pages get cached.. I am almost sure that if I solve this, I would boost my accuracy by atleast 20%

Subscribe to a hosted service (iwebtrack, webtrends live, etc.) and put the Javascript code in your pages. Even if the page is cached, the user will still be tracked because the Javascript will register a page view on the stat provider's servers every time. I use both the raw log files and a hosted service and between the two I get a much better idea of how many visitors there are and where they are coming from. But definitely use a tracking URL instead of the referrer when it comes to determining where your visitors came from.