DaThing - 5:03 pm on Sep 12, 2009 (gmt 0)

Hi Tedster, thanks for the welcome.

The site allows visitors to add their own content (mostly comments, but also pics and links) and we check every single content added, everyday. It's a really time consuming task but we do it carefully. And no, there are no outbound links to bad neighborhoods nor any server hack (as far as we can know).

Three months ago we changed the template of all our sites, and we 301'd every single page to the new one. All the 301 were to the same domain as the original, something like "entry.asp?id=2" to "content.asp?id=2".

Once we did the migration, Google began its dance, and it seemed that every domain has its own different music. We saw the yo-yo effect in all the sites (with diff periods of highs and lows for each one) but the two oldest and with bigger trust range didn't notice any traffic change.

It really didn't bother us much, because those sites with the yo yo effect where the less important for us. But then, on 11/9 our highest earning website felt down to the ground. Is it a yo yo effect? We don't know yet. If it is, it comes with about 3 months of delay, and the coincidence in time with the changes in Google's is too much to be just... coincidence.