we're having a problem with Firefox while using your slideshow. All pictures are shown on the right site, but the arrows to switch the pictures are located on their right place.
The next problem is on IE - we used margin-top to have the same space between the slideshow and the menue as between the slideshow and the footer. This works fine in every browser but not in IE8 and IE9 and maybe IE10 as well.
We started using WordPress some weeks ago so we have not much experience with it but we found your slideshow very well and want to use it.