When I upload my site to the web my photoshop graphics which had transparent backgrounds in the application view of the page now have black backgrounds. www.blacksheepdogs.com
Are you referring to images like this one?
The images in question are JPGs: this format does not support transparency. They would need to be either GIF or PNG. Either Photoshop is saving them as JPGs or iWeb is converting them to JPGs.
See my reply to your other post regarding transparency.
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