Okay, this is actually pretty specific. On Firefox 3.6.23 running on Mac OSX 10.4.11, all of the comment and search icons for posts hide in the corner of the screen, like this:
In that image, the comment and search icons are all stacked in the top right of the top post, which was the top post of the page I was viewing. Notably, the inset screen that displays after clicking on a tag does not have this problem; everything displays correctly inside the inner window.
I know this bug really won't likely affect many people, but I figured it was my duty to submit a bug report where one existed.