lucy24 - 1:54 am on Apr 21, 2012 (gmt 0)
Wasn't there a recent thread that asked the opposite question? g### seemed to be perfectly happy with old pages, and then the owner made some tiny change and everything tanked :( Made me wonder if something triggered a "re-index from scratch" command in google's innards.
Can g### tell if a page has really changed? The mere act of re-uploading the same files will create a new header with a new timestamp. Is the date of a php page the date the files were first uploaded, or the date the page was created (i.e. right this instant)?