[jQuery] fading rollovers causing problems in IE6 and IE7

[jQuery] fading rollovers causing problems in IE6 and IE7


I've used the code provided by,
http://jqueryfordesigners.com/image-cross-fade-transition/
Here's the site in question,
http://www.hbportfolio.net/clients/thestlnightlife/
Any idea why sometimes it would show both images underneath each other
in IE6? It shows last image twice in IE6. And I think it shows double
images for all in IE7. It's really weird...
Any ideas?
Thanks in advance! :)