[Jeff Ledger]

Add this to additional.css

.wgo_block .blockbody {
    background: none repeat scroll 0 0 transparent;
    border: 0 none;
}
#sidebar_container .blockbody {
    background: none repeat scroll 0 0 transparent;
    border: 0 none;
    border-radius: 20px 20px 20px 20px;
    color: #424242;
    padding: 0;
}
#sidebar_container .blockrow {
    background: none repeat scroll 0 0 transparent;
    border-radius: 20px 20px 20px 20px;
    border-top: 0 none;
    padding: 6px;
}
#sidebar_container > ul {
    background: none repeat scroll 0 0 transparent;
    border: 0 none;
    border-radius: 20px 20px 20px 20px;
    box-shadow: none;
    float: left;
    width: 100%;
}

Remember to change your text color as well to make it more readable.