Emersonworldwide, here are my comments too:

1. W3C shows 74 errors. Because the tools I use go deeper, I found 102 errors and 82 other issues.

2. You should have a proper doctype on each page. If you don't Internet Explorer will go into quirks mode and display it different. And having doctypes it makes your pages search engine friendlier. Some info for the question you asked about DW: Get your DOCTYPE right
and bout ranking factors see here: SEOmoz | Google Search Engine Ranking Factors

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