Why are my blocks not transparent

[Jeff Ledger]

add this to additional.css

.cms_widget {
    background-color: transparent;
    border: 0 none;
}
.widget_content {
    background: none repeat scroll 0 0 transparent;
    border: 0 none;
}
.cms_widget .block {
    background: none repeat scroll 0 0 transparent;
}

also remove the ugly stylevar shadow_color (set to transparent).

My css also remove all the border of the blocks, if you need it back, just remove these border lines.