Testing jquery corners in FireFox 14.0.1
This demonstrates that jquery 1.7.2 and ui-1.8.21.min.js do not provide the proper css for corners for firefox 14.0.1
HTML
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/themes/start/jquery-ui.css">
<span id = 'tspan' class=' ui-widget-header ui-corner-all' style='background-color:grey;'>hello there</span>
CSS
/* span {border-radius:5px; }*/