[KuRi]

in 'All Style Options' part of the 'Style Manager', find near the bottom of the page 'Additional CSS Definitions' and add the following in the second box

.postbitinfo {
background-color: #E6ECF4;
border-top: 1px solid #4775A7;
border-right: 2px solid #4775A7;
border-left: 1px solid #4775A7;
border-bottom: 2px solid #4775A7;
padding-top: 3px;
padding-right: 0px;
padding-left: 3px;
padding-bottom: 3px;
margin-bottom: 3px;
}

change #E6ECF4 to the background colour you would like and change all 4 instances of #4775A7 to the border color you would like... the colors there are the same (or as close as i could get) to the example you posted

scroll right to the bottom and hit save

then in your 'postbit_legacy' template

find

<div>$vbphrase[join_date]: $post[joindate]</div></if>

change to

<div class="postbitinfo">$vbphrase[join_date]: $post[joindate]</div></if>

also below this code you will see simelar code for the location, age, posts and reputation.... where the div tag starts

<div>

replace these with

<div class="postbitinfo">