Anchor tags not working in jquery slider

There is an image slider at the top of this page:

http://www.example.com/

Each slide is wrapped in an anchor tag and is supposed to link to a开发者_开发百科 post somewhere else on the site. However, the slides don't seem to be clickable and I can't figure out why. My suspicion is that there must be some sort of z-index issue but hours of tinkering hasn't gotten me anywhere. Ideas?

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A few things I would have tried:

1. The a-tag should probably have its display css property set to block.
2. One of the slideshow containers has its z-index set to -1. This could result in it's content effectively being covered by another element for click purposes.