I have created a new website for our business in DW. For SEO reasons I have reconfigured the DIV order so that my main content is at the top (in the HTML) rather than the top NAV as this is the main content i want the spiders to crawl first and i can easily manipulate the first URL which the spider will index which is usually has the most weight.
I have used CSS to give the bottom of the mainpic div some margin, then used absolute positioning for the body to move it down in to this area so it look correct and as it should.
I have positioned it in DW so it looks correct in IE. but when i open it in FF, Chrome etc there is around a 5pix gap between the bottom of the mainpic DIV and the Body DIV.
Below is the link to a test page i have created where you can see the problem. Open the page in both IE and FF and you will see my problem.
I have positioned it in DW so it looks correct in IE. but when i open it in FF, Chrome etc
You did it backwards. Never, ever use IE as a reference for how things should work. Always, always use a modern browser to check your markup first. THEN look to see if/when IE screws things up. As evidence of this, notice how you saw the modern browsers performed the same as each other.
Never, ever trust IE to do anything right.
More in a bit (though I'm deathly ill today).
EDIT: Haven't checked to see if it affects this but you have two HTML errors and 5 CSS errors.