Oops! This a fix for 4.x
Put this in additional.css
Code:
.toplinks .nonotifications a.popupctrl {
background: none;
padding: 3px 3px 3px 4px;
}
.toplinks .notifications a.popupctrl:hover, .toplinks .nonotifications a.popupctrl:hover, .toplinks .nonotifications a.popupctrl.active, .toplinks .notifications a.popupctrl.active {
background: none;
padding: 3px 3px 3px 4px;
}
.popupmenu a.popupctrl {
background-image: none;
}