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Bill explains:If I got one of these responses it has stuck ever since.
During the transition from the old rank to the target rank, the transition rank might cause:
a time-based delay response,
a negative response,
a random response, and/or
an unexpected response
If these transitional ranking shifts are followed by what looks like a responsive action from the website, the URL or website which was previously only SUSPECTED as spam, might now be positively tagged as spam.
Just to be clear: You did not make any changes to existing content, you just added new content?That would be correct, I should have just written that in the opening post. Given that Bing and Yahoo still like these pages I don't think I did anything drastically upsetting and the metrics remain virtually identical for both of them. I have no Google metrics to verify for these pages anymore and so I doubt it's a metrics thing. The rest of the site didn't suffer the same fate.
It might be a good idea to experiment and change one or two of them back and see if it makes a difference.
A link today is a vote for the page today. If you update the page tomorrow then yesterdays links are no longer as strong a vote for the 'new' content. It's the only thing that makes sense right now.