Thanks, Ben - got it to work with this (based on your suggestion):
Text Formatted Code
.story-body img {
border:1px solid #DDDDDD;
background-color: #FFFFFF;
margin:3px 10px;
-moz-box-shadow: 5px 5px 10px #888;
-webkit-box-shadow: 5px 5px 10px #888;
padding:5px;
}
the -moz makes it work in Firefox, and the -webkit supposedly makes it work in Safari, but I can't check that as I'm a PC guy.
box-shadow is NOT supported in IE, I'm afraid. Maybe in IE 9.