Page is a not externally linkable
Reid - 6:39 am on Mar 11, 2005 (gmt 0)
Big dot com engineer decides to modify htaccess so that non-www redirects to with-www but does not specify 301, default is 302. Big dot com freaks, fires engineer and freaks on google.
I bet that was the reason behind googles rollback.
Google spiders big dot com twice, once with www and once without so there are 2 copies of every page in googles index.
Googles duplicate content filter bans big dot com.
Google does rollback on index to restore big dot coms SERP's immediately.