This bit is driving me crazy, and I finally figured out what the source of the problem was: The default link color in the security site is a fairly light faded blue (#3D85B0) making links less visible, while visited links are visibly higher saturation and higher contrast against the background (#1b608a), making them more visible than unvisited links.
The end result is that new questions are effectively "greyed out" and less visible in comparison to old questions. That is, the when you visually scan the list of questions, the questions that you have already visited stand out, while the new ones fade into the background.
This is backwards. The question you haven't seen yet, the new ones, should draw your attention. This is the way all the other stackexchange sites work.
When I'm on this site I find myself returning to questions I've already answered and missing questions I haven't seen yet because the visual cues are counter-intuitive.
A simple fix is to swap the a
versus a:visited
colors in the stylesheet.
EDIT
For other people having the same problem, you can create a user-stylesheet (the plugin stylish can make this easy for Firefox/Chrome). I put the following into mine, and everything looks cleaner:
a { color: #004377; }
a:visited { color: #8C9DA9; }