Click area differs between IE and firefox

Hello,
I have rather interesting issue on my web site. At its front page I am using images with some sliding text on them. I was expecting to visitor being able to click on whole area of particular image to get to appropriate page linked to the <A> element. This works nicely in FireFox but not in IE.

IE is not allowing to click where the text is showing. I would greatly appreciate your help if you can take a look at http://www.richard-vanek.eu/ and try to see it live.

The CSS defining classes for this part is at http://www.richard-vanek.eu/css/frontpage.css

Thanks a lot for you time and tips!

-richo-

I know I described it rather fuzzy, but maybe you can take a look with IE and than you know.

I am clueless and would really appreciate your help.

-r-

Have you tried messing with the z-index for the h4 elements?

Playing with z-index didn't help.
I played a bit more and find out that only exactly areas where is a text where not click able in IE8. I have converted all of them to <a> links. Now it is lie I wanted. Only I have 3 links pointing to the same page :-)

Maybe you can find better solution?
Thanks in advance!
-r-