User:DCoder/monobook.css

/* rounded corners on tabs */

#p-cactions ul li, #p-cactions ul li a {  
  -moz-border-radius-topleft: 1em;
  -moz-border-radius-topright: 1em;
  border-radius-topleft: 1em;
  border-radius-topright: 1em;
}
#content { 
  -moz-border-radius-topleft: 1em; 
  -moz-border-radius-bottomleft: 1em;
  border-radius-topleft: 1em;
  border-radius-bottomleft: 1em;
}
div.pBody {
  -moz-border-radius-topright: 1em;
  -moz-border-radius-bottomright: 1em;
  border-radius-topright: 1em;
  border-radius-bottomright: 1em;
}