Thread:JoePlay/@comment-27075564-20170611165403/@comment-171752-20170619175100

After looking at things with Chrome's inspect tool, I figured out that Dragon Age has this block of code on their Monobook.css that applies to the portal slider.

.ui-widget-content { background: none !important; color: inherit !important; } .ui-corner-all, .ui-corner-bottom, .ui-corner-right, .ui-corner-br { -moz-border-radius-bottomright: 10px !important; -webkit-border-bottom-right-radius: 10px !important; -khtml-border-bottom-right-radius: 10px !important; border-bottom-right-radius: 10px !important; } .ui-corner-all, .ui-corner-bottom, .ui-corner-left, .ui-corner-bl { -moz-border-radius-bottomleft: 10px !important; -webkit-border-bottom-left-radius: 10px !important; -khtml-border-bottom-left-radius: 10px !important; border-bottom-left-radius: 10px !important; } .ui-corner-all, .ui-corner-top, .ui-corner-right, .ui-corner-tr { -moz-border-radius-topright: 10px !important; -webkit-border-top-right-radius: 10px !important; -khtml-border-top-right-radius: 10px !important; border-top-right-radius: 10px !important; } .ui-corner-all, .ui-corner-top, .ui-corner-left, .ui-corner-tl { -moz-border-radius-topleft: 10px !important; -webkit-border-top-left-radius: 10px !important; -khtml-border-top-left-radius: 10px !important; border-top-left-radius: 10px !important; } .ui-widget-content a { color: #FEC356 !important; }

So copy & paste that to Monobook.css and see if that fixes it.