Links Change Site Style(?)

[SassKwatch]

Working on a new site (found here), and have pretty well flushed out the design for the image_template, but have run into something strange I've been unable to figure out.......

In Firefox 3.08, if I have the 'Light' style loaded, and click any link on the page, the style is changed to 'Dark'. The only linkable item that seems not to generate this style change is the 'Comments' link.

And fwiw....., if I start with the 'Dark' style loaded, no Style changes occur when clicking any of the available links.

The above doesn't occur at all in IE7.

The FF install is a fresh one (within the last week or so), and I do have a # of addons installed. I've disabled a couple that seemed likely to interact with links, but so far that hasn't affected the unwanted behavior.

Any thoughts?

Thanks!