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According to the FAQ's, No.

http://www.seomoz.org/dp/webapp-faq

Unfortunately I can't speak for how SEOmoz handles rewrites like this if it's already crawled the page.

The rewrite rule you're using looks like it's only rewriting the www portion of the URL, not index.html. So alone it wouldn't do anything to solve dupe content issues. (someone please correct me if I'm misreading the rewrite rule)

Here's a link to what I used to write a redirect for index.html on another site.

http://www.webmasterworld.com/forum92/6375.htm

I think it is a fairly safe assumption to make that SEOmoz is smart enough to realize if you're got a redirect in there (providing that its working). I'd still recommend taking a look to see if Google has cached or indexed an index.html version, though.

Edit: my personal, highly technical, acid-test for an index.html redirect is just going there and manually entering the url with index.html on the end, rather than waiting for a recrawl to see if you're heading in the right direction.

As you did, I'd normally handle this with a 301 from index.html to the root domain. When you say that it's "not had an impact" do you mean that the SEOmoz dashboard continues to show an error after it re-crawls, or that the search engines are not picking up the redirect?

SEOmoz dashboard does a great job, but I'd check to see how the search engines are actually indexing yourdomain.com/index.html vs. yourdomain.com also. If the search engines are indexing it as you want them to, then I'd be inclined to ignore the dashboard error.

I apologize if this is a stupid question, but I assume you manually checked that the redirect worked?

I'm working on a site that is throwing off a -lot- of duplicate content for its size. A lot of it appears to be coming from bad links within the site itself, which were caused when it was ported over from static HTML to Expression Engine (by someone else).

I'm finding EE an incredibly frustrating platform to work with, as it appears to be directing 404's on sub-pages to the page directly above that subpage, without actually providing a 404 response. It's very weird.

Does anyone have any recommendations on software to clearly map out a site's internal link structure so that I can find what bad links are pointing to the wrong pages?