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You could try: http://validator.w3.org/checklink

If you have canonical tags on these pages, don't worry about it. But you might want minimize these pages and/ or redirect them to a primary. The dynamic url "?" may also be making it hard for seomoz to see the canonical tag. I would ask seomoz here: http://www.seomoz.org/about/contact Also SEOmoz checks all pages, whether they are cached by google or not.

I use the redirection plugin for wordpress to manage this. I personally use it to take care of another site I have redirected to my current site, but don't have access to the .htaccess file, and use it to take care of pages from the old site that don't exist on this site. It has a handy 404 log you can use too, and create redirects right from the 404 list. This might work for your old URLs that were renamed.

I would consider either to be fine.

Pages that should contain the canonical tag aren't nescessarily 'offending' anything. They are just pages containing the same information as another page, where usually the only difference is a (non-significant) URL parameter.

you can take a look to at : http://rss.icerocket.com/ http://www.ponyfish.com/ Free accounts that you can create RSS feeds for any site

Still laughing about the frames. Man, I am old, so frames were part of the web back in the day, whoever these people are that are doing this work, they need to put their slippers and reading glasses on and sit down in front of the fire with a glass of warm milk. Frames, made my day I tells ya!

Ditto that. Domain Alias = Domain Masking. htaccess is a 301 redirect. You probably want to just use a site 301 redirect, also called site forwarding. But 301 is the correct forward as it is considered permanent.

Thesis is a theme/framework that is built for WordPress.org. Tumblr is a free blogging software. For SEO perspective, I'd go with, hands down, Thesis. First off, your URL on tumblr is sitename.tumblr.com. Secondly, it's free, so it's never as good. Thesis is built with a lot of in-code SEO so the site has maximum growth. I'd definitely go with WordPress/Thesis.

One does not always have the option to use a canonical. If you have the option; always go with the 301-redirect in such a scenario. If your concern is about the SERP's only you can try this bit of code in a htaccess file (if you use apache): RewriteCond %{SERVER_PORT} ^443$ RewriteRule ^robots.txt$ robotsssl.txt Then add this code to your robotsssl.txt User-agent: * Disallow: / Have a good day! Jan

If you're worried, switch it to a local registrar. It won't take too long to propagate. I would go for it, if it's not a high trafficed site.

You better back up your DB before doing that. Anyway, take a look at this MagentoConnect extension http://www.magentocommerce.com/magento-connect/MageWorx.com/extension/2852/seo-suite-enterprise#overview or this one (it's by the same company http://www.mageworx.com/seo-suite-pro-magento-extension.html

Following up here -- did this answer Dave's question?