Firefox CSS issue (IE works fine)

I’m seeing odd CSS behavior in my sidebar but only in Firefox (1.5.0.9). I’m using a dynamic sidebar with the standard objects: Pages, Links, Categories, Archives and Meta as well as a BF2 Stats widget. The Pages & Links text are at the top of the sidebar and display with the correct CSS but the rest of the section links below that (Categories, Archives, BF2 Stats and Meta Links) appear to be displaying without CSS. When I view the page in IE 6 all of the section links show up with the correct CSS applied.

When I view source in FF I see potential problems. (1) All section titles have a div tag with class = title but the section titles that appear correctly are also surrounded by an LI tag with class = pagenav while the other section titles do not have that extra LI tag around them in FF. This is the same source as in IE 6 however so I don’t think it could be the problem.

(2) In FF the Pages link has a div tag with class=\”title\ but the div tag for the “broken” section title links just show as class=”title”. That doesn’t seem like it is the problem either, I get the feeling that the CSS is just mucked up somehow.

I’m currently on WP 2.0.2 and I’m using the Fighting the Darkness theme which was written for WP 1.5 but I modified it to use widgets and dynamic sidebar. The site is http://www.doppelbock.net/

My CSS validates (the only errors are some duplicate colors) and is located here: http://www.doppelbock.net/blog/wp-content/themes/Fighting_the_Darkness/style.css and I get the feeling there must be some nested tags that are causing my issue. I originally thought the sidebar was just flat-out broken until I checked it with IE where it looked fine.