I keep finding the "most active" threads don't link to anything

[BalloonSlayer]

It comes and goes but it does it on my netbook as well as the main PC.

When you say "don't link to anything", what happens if you click on them?

Nothing. When you move the arrow over them a line doesn't appear underneath like it normally does, so I can't click.

As I type, School shows and Cue tears have got a line under and can be clicked on, the others haven't.

Ah, you're talking about the links in the sidebar. These should be fixed soon, in the mean time you can use the links at the top of the page, or browse from the topics/threads pages instead.