.block {
width:auto;
/*float:left;*/
margin-right:10px;
/*border:1px solid red;*/
margin-bottom:10px;
}

.block h3 {
border-left:10px solid #FF9900;
padding-left:10px;
}

#content ul {
list-style-image:url("puceC.gif");
}

#colA, #colB {
width:45%;
float:left;
}