Is it possible to remove that ugly black background around PNGs with opacity < 1 in IE?

Here's my site: http://rps.sanscode.com

Load it up in IE7 or 8 and you can see the ugly rings I am talking about.

Does anyone have a solution to get rid of th开发者_如何学编程em? or perhaps some advice on how to change the images to remove them?

I am using jQuery if that helps.

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I've successfully used the code from here: http://youngpup.net/projects/sleight (demo page here: http://youngpup.net/projects/sleight/demo.html) to do this on my site http://entrian.com/source-search/

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You can use AlphaImageLoader on pngs to help with this, just like on gifs. I've seen that in a few Colorbox themes.

Note that forces some compromises on CSS - you can't use background positioning on these images, for instance.