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It's worth noting that most sites that get affected by penguin don't get bad link warnings.  The pattern seems to be that if you get a manual review & penalty you get the warning, but if you are just ranking poorly because of the factors surrounding backlinks that penguin introduced you don't. The biggest give away to whether you are being affected by penguin are the dates at which your rankings drop. Compare these with the algo update history and you'll soon know for sure. I'm guessing that is a pretty competitive niche, so I'd imagine it will be difficult to get much comparable data for the two sites until they are better established and have a lot more links.  However that is definitely the way to go.

Hey, I don't think you are safe from an issue with cannibalization just because the one tool says you don't have that. From the situation described, it sounds like you do have issues on your site with overlapping content and that could be hurting your ranking (as could other factors too, obviously). The best way to find out is to remove the content that you think is overlapping or self canabalizing and then see if you regain rankings. I'm not certain how the cannibalization check happens in SEOmoz's on page tool, but I have seen instances where cannibalization is missed if those pages are not linked together. As I understand it, that on page tool checks only the one page as opposed to an in depth site crawl. Hope that helps. Matthew

Hi Colin, They are exactly the same in both browsers - interesting though I did note that one browser reported About 120,000,000 results  (0.17 seconds) while the other reported About 124,000,000 results  (0.22 seconds)So sounds like some sort of filter at play?Thanks,Sinead