My latest version of Firefox does not display my web site the way it used to. Go here www.bobzphoto.com using Firefox and then try it with Safari or Explorer. you will notice that the drop shadows look all wrong with Firefox.
All the details are in my question. Go to my site, compare how the drop shadows look around every one of my photos vs. how they look when viewed with Safari or Explorer. Pretty self explanatory.
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That is unfortunately a bug (Bug 662898) that slipped into Firefox 5 and that will be fixed in Firefox 6, due to be released in August.