Google has apparently 2 caches

never realised this before!

[cornwall]

No doubt this is well known to afficionados, but was not to me.

An article showing how Freshbot and Deepbot lead you to different caches [searchengineshowdown.com] - useful if you are trying to check changes in web sites.

The nub of the article is

These two crawls can have two separate cached copies at Google. For example, a search on lisnews today finds the top hit with a date of "Feb 10, 2003." Click on the "cached" link, and the latest story is actually from Feb. 9. But a direct search for cache:www.lisnews.com pulls up a page cached Jan. 11. Both pages are searchable in Google's index. But for hardcore cache users, the point is that there are two versions of the page accessible from Google, if you are willing to do a little digging.

[lazerzubb]

Yes that is true.

Key_master also noted a good point in
Googlebot: Deepbot and Freshbot FAQ and Information [webmasterworld.com]

That Freshbot only spiders html pages, and not .pdf .doc etc.

I've seen the normal database have more than 1 cache of a page too (Without the freshbot)