Rounded Box

<div class="boxcontainer">
  <div class="t"><div class="b"><div class="l"><div class="r">
     <div class="bl"><div class="br"><div class="tl"><div class="tr">
        <div class="boxlabel">{LABEL}</div>
        <div class="boxcontent">{CONTENT}</div>
     </div></div></div></div>
  </div></div></div></div> 
</div>

.t {background: url(/images/dot.jpg) 0 0 repeat-x;}
.b {background: url(/images/dot.jpg) 0 100% repeat-x;}
.l {background: url(/images/dot.jpg) 0 0 repeat-y;}
.r {background: url(/images/dot.jpg) 100% 0 repeat-y;}
.bl {background: url(/images/bl.jpg) 0 100% no-repeat;}
.br {background: url(/images/br.jpg) 100% 100% no-repeat;}
.tl {background: url(/images/tl.jpg) 0 0 no-repeat;}
.tr {background: url(/images/tr.jpg) 100% 0 no-repeat; padding: 5px;} 

.boxlabel {
   float:left;
   display:inline;
   position:relative;
   top:-5px;
   left:5px;
   padding: 0px 2px 0px 2px;
   background-color:#FFFFFF;
   color:#1E90FF;
   font-size:10;
   font-family: Arial;
}

.boxcontent {
   position:relative;
   top:-5px;
   text-align: left;
}

.boxcontainer {
   margin: 5px;
}

The boxlabel float left with relative/top/left position to adjust its position. And its background-color is set to make the background opaque, otherwise, it is transparent and the below border line is shown.

Also, note that we have a padding on the last img div, to avoid text inside the box overlap with image.

See: CSS and Round Corners: Build Boxes with Curves