Today I noticed something weird, when I was searching MSN I found a different cache for my website with two different searches. I recently changed a title for a page and when I do a search I find the new title and when I do another search with different keywords I get the old title and older cache date for that page...
yes this has happened several times in recent months. I currently have a site with 2 different caches each appearing randomly.
I believe there is a meta tag called noarchive that you can use if you don't want your site to be archived like this.