the code actually adds a hardcoded element style width of 10px + the image width to the html:
style="width: ' . (10 + (int) $width) . 'px"
so then in your html you have:
<div style="width: 810px">...</div>
For every single captioned picture in your site. Which just seems like bad code to me. Stuff like this is what CSS was invented for.
I took out that whole part, rather than just the 10px padding, and my stuff still looks fine in IE, FF, and Chrome.
