I found this article on how to create a Mega dropdown using jQuery. http://www.sohtanaka.com/web-design/mega-drop-downs-w-css-jquery/. It works great, however when I customize the look of it and use a PNG as a background, it puts a black border around the image. This is happening in IE 6,7, and 8. I have tried many PNG fixes that I found on the web and nothing seems to be working. I know that PNG's work fine in IE 7 and 8, but it seems to not work when I involve jQuery into the mix.
Sorry I should have been more clear. It's not really a border, it turns any Transparent PNG image I use that has a shadow on it, and make it all black and not transparent. It doesn't render the transparent image well at all in IE6, IE7, and IE8
You need to be exporting your PNG graphics as 24-bit with transparency and the appropriate canvas color in Photoshop and 32-bit in Fireworks.