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'This is google's cache of.
Google's cache is the snapshot that google took of the page as they crawled the web. The page may have changed siche that time. Click here for the current page without highlighting.'
I am not entirely clear about what this means.
If you follow the link above you will see 'cached' written after each result - this is where your visitor clicked.
Let me know if I didn't explain this too well ;)
(Welcome to webmasterworld by the way :))