css layout problem

I am using css to lay out my site.

I am fairly experienced but get confused with cross-browser problems.

Two divs, 'lefttitle' and 'left' will not align according to my design (the
proper design can be found at
http://www.munzamedia.co.uk/pr3fix_music/photo_layout.gif ).

My site is at http://www.munzamedia.co.uk/pr3fix_music/index.htm

In IE6 the left column aligns correctly, but in Netscape and Firefox it does
not. I think the problem is to do with the way in which different browers
understand margins.

How can I get this design to work in different browsers?

Thanks,
Mark

fixed now - I used containers to chunk the site together. Seems to work pretty well across browsers now.

see http://www.munzamedia.co.uk/pr3fix_music/index.htm for the fixed layout (in progress)