i would start with a netscape resize fix.. i would also change you text & use a css to format the text so the surfer can not change the text size..when i change the text size to a lager one, your page gets a bit out of alignment.
i dont lnow how it happened using dreamweaver as i use dreamweaver & my layers came out fine on all browsers, although in firefox my own site seems to have problems with firefox not showing the javascriot elements & certain elements of the css & i havent found a firefox fix for it, but no big deal as my site isnt dependant on it for the two or 3 particular parts that differ
http://www.beatingskull.com