Why does DW change my image's proportions?

Question

EVERY image I bring onto my Dreamweaver CS4 pages comes in out of proportion unless I use it as a background image inside a div.
When I try to resize it, it springs back to the same wrong proportions. When I go into the html and enter the actual pixel dimensions into the code, it STILL remains out-of-proportion.
I'm not sure if this is a bug, or what could be causing this, but I need to solve this, so any help will be greatly appreciated!

Answer 1

Thanks for your response. The code to the div is below, plus attached is an image of the out-of-proportion image of the map inside it.
CSS:
#map{position:absolute; top: 394px; left: 494px; width: 336px; height: 180px}
HTML:
<div id="map"><img src="images/map.jpg" width="336" height="180" /></div>