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Is it possible for it to be partially updated

     
4:49 pm on Apr 20, 2004 (gmt 0)

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Is it remotely possible that the google cache would reflect only some changes to a web page?

For example if a page has its left nav changed, could this appear in the cache but the rest of the page be from the old page - more specifically a single line at the very bottom of the page not be updated?

If google doesnt do this directly is it possible an isp may have served it some kind of mongrel page?

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2:20 am on Apr 21, 2004 (gmt 0)

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Is it remotely possible that the google cache would reflect only some changes to a web page?

It's unlikely.

more specifically a single line at the very bottom of the page not be updated?

That's rather odd.

If google doesn't do this directly, is it possible an isp may have served it some kind of mongrel page?

It would be your website hosting company rather than your Internet Service Provider. Are the people hosting your site a reputable bunch? If they're a respectable company, it's unlikely; if they're Billy-Bob and Bubba's free hosting, based on a barge in the Mississippi, then perhaps it's possible.

3:56 am on Apr 21, 2004 (gmt 0)

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I agree that it would be quite unlikely, from my knowledge of crawling/indexing. Pages are pretty much updated atomically. I could imagine some weird corner case where a page consists of a frameset with multiple frames, and maybe one framed pages was crawled/updated without the rest being crawled? That would be extremely unlikely though, and I doubt that's what is happening here.
4:07 am on Apr 21, 2004 (gmt 0)

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is the navigation controlled by an external JS file? And thus could the old cached page be sourcing a new JS file from the server?
8:38 am on Apr 21, 2004 (gmt 0)

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Thats what I figured too.

Hosting company are reliable and they have checked this out for us but can't find anything.

Its a straight html page. No javascript.

Well thats not quite true, on our webserver the page has no javascript, but unfortunately, somewhere between the plain html file residing on our server and the google cache, a snippet of javascript has been added just before the </body> (looks like some russian outfit is behind it).

We figured our webserver was infected with something or other, so we did a complete re-install of the server, scanned any files to be re-used etc. After the re-install we changed the left nav on the page. The google cache picked up the left nav but the extra js was still in there.

We checked our web server again but there is 100% no js in the source html. Our web hosts have scanned everything and are 100% sure the server is clean.

Fortunately the page got re-cached overnight, since first posting this, and the snippet of js is no longer there but I am concerned as I don't really understand what is happening.

10:15 am on Apr 21, 2004 (gmt 0)

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logically not possible.
11:46 pm on Apr 21, 2004 (gmt 0)

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Was the "extra" javascript confirmed as existing on multiple unconnected client computers?

Could be a client worm/virus/spyware/etc...

2:21 am on Apr 22, 2004 (gmt 0)

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That's very strange. In my experience, I've never seen just part of a page be updated before. If I had to guess, I'd lean toward the page being like that when we fetched it.
 

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