Strange log entries from Google Referrals

Are they sending customers to non-exitstant pages?

[ChrisXenon]

I have a home-grown logging system for my E-commerce website.
It is showing me some puzzling log entries for pages which do not exist on my site.

These requests for non-existant pages are trapped by my error document and customers are sent to my index page, where they are logged - this is how I know about them.

The URLs being accessed all come from Google searches, and their names are of the form:

search=cache:Y4L1YB4xYH0C:<my url>+<search string entered at Google>&hl=en&ie=UTF-8

The referring URL is of the form:

[google.com...] Google Search string>&btnG=Google+Search

Other forms replace the search with urlturl where the referrer is reported as simply "urlturl" as well.

Anyone know what this means?

Thanks,
Chris

[c3oc3o]

Are you sure they are caught by your 404 and redirected to your index page, and not visiting the copy of your index page directly in Google's cache?
If your logging system works by JavaScript or images, it also counts visitors there, but of course URL and referrer are at Google.

I don't understand "urlturl" though.

[ChrisXenon]

Thanks for your time & explanation. I think it's the cache, as you say.

Cheers,
Chris