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djbaxter
Guest
Adding new content can cause your site to plummet too, mine dropped from No4 to No564 overnight a day ago. All I did was add a couple of new pages.
It's doubtful that adding new content caused it. Typically, search engines love fresh content.
Indeed, it probably is not connected to anything you did - it's more likely it has to do with changes in the status of pages linking to you and/or changes in the status of your competitor's pages and/or general algorithmic changes.