A forum available on Webmaster World asks whether Google has undergone its October 2007 update.
This forum was started by Snappy Fish who asked, " After years of PR6, my site's tool bar PR has dropped by a PR factor of 1 since this morning. Has anyone else noticed this – is there any chance that hand ediiting could be involved here. There has been no change in rankings."
Discussion continues in Webmaster World.