Sept-Oct Google Update
Well Google is up to some major updating now and it looks like it won't be over for a few more weeks.Related Threads:
Webmaster World
Search Engine Watch
Looks like they are attacking spam and bad linking. They might be trying to fix a redirect issue with non-www urls not redirecting to www version of the url.
As most people who believe in Search Engine Relevancy know that your dedication to site growth and relevant page clarification will prevent your site from being hit everytime Google does this. DO NOT OPTIMIZE... BUILD RELEVANCE INSTEAD
