Typically, I struggle with IE8, but in this situation it's the only browser that displays the form background color correctly. It's interesting how the CSS only works as intended in IE8, while Firefox and Safari don't show any background color on the forms.
#defaultform {
width: 500px;
padding: 20px;
background: #f0f0f0;
overflow:auto;
/* Border style */
border: 1px solid #cccccc;
-moz-border-radius: 7px;
-webkit-border-radius: 7px;
border-radius: 7px;
/* Border Shadow */
-moz-box-shadow: 2px 2px 2px #cccccc;
-webkit-box-shadow: 2px 2px 2px #cccccc;
box-shadow: 2px 2px 2px #cccccc;
}