Always transparent background in profile view:

Open templates/tmpl_uni/css/profile_view.css,
and add this before #thin_column

.main
{
background : transparent;
background-repeat: no-repeat;
}

-----------------------------------------------
If you will change border and something use this:
.main
{
position:relative;
width:940px;
border:0px solid #999;

background : transparent;
background-repeat: no-repeat;


margin-bottom:5px;
margin-top:4px;
margin-left:auto;
margin-right:auto;
padding:8px see more 10px;
}