If you view it in Safari I'll bet you'll see the same thing.  I believe it's caused from webkit browsers loading the jQuery before it finishes loading the images.  Try placing the call for your slideshow in a document load event and it should be fixed. If not then it's something I would have to look at to tell you how to fix it.

Document load event example:

$(window).load(function () {
	// run code
});

Hope that helps
-Elijah