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

<span id = 'tspan' class='.ui.corner.all' style='background-color:grey;'>hello there</span>

CSS

/* span {border-radius:5px; }*/

JavaScript

/*
$(document).ready(function() {
    $('#tspan').addClass('ui-corner-all);
 }
*/
alert('is this working?');
alert($('#tspan').hasClass('ui-corner-all');