#content{float:right;width:50%}
#content .attachment{margin:0 0 0 100px}
#content .wrapper{float:left;width:420px}
#sidebar{float:left;width:50%}
#sidebar .wrapper{float:right;width:420px}
#sidebar h2{padding:0 0 0 196px}
* html #sidebar{width:49.9%}
*:first-child+html #sidebar{width:49.9%}

#sidebar #archive {background:transparent url(../images/ui/border-x.png) left top repeat-x; padding: 20px 0 0; margin: 0 0 20px;}
#sidebar #archive .entry {background:transparent url(../images/ui/border-x.png) left bottom repeat-x; padding: 0 0 10px; margin: 0;}