Well, the link in the banner image works on your entries! But no others.
You might want to correct some of the validation errors in your page, one of which involves a problem at the end of the last link that works. Check out
this validation site for this page - I think it's looking for the img tag to be finished correctly on line 88.
You'll also find that the scriptaculous scripts can't be found or accessed - I'm getting error 500's on them.
And while you're at it, you could try commenting out that other javascript to do with hyperlinks.
Then see if you still have the problem.
I can't see why any of this should have the effect you're reporting but acting on this will at least eliminate some of the possibles.