一种可能性 - 风格相互冲突。检查 html 和 CSS 文件中的left:(或right:)CSS 属性。我认为班级的风格 -
.ui-dialog .ui-dialog-titlebar-close
是矛盾的。
编辑:
<head>
<script type="text/javascript" src="//code.jquery.com/jquery-1.9.1.js"></script>      
<script type="text/javascript" src="http://code.jquery.com/ui/1.9.2/jquery-ui.js"></script>
<link rel="stylesheet" type="text/css" href="http://code.jquery.com/ui/1.9.2/themes/base/jquery-ui.css">
<link rel="stylesheet" type="text/css" href="/css/result-light.css">
<style type="text/css">
.ui-dialog {
    position: absolute;
    top: 0;
    left: 0;
    padding: .2em;
    outline: 0;
    overflow:visible;
}
.ui-dialog .ui-dialog-titlebar {
    background:transparent;
    border:none;
}
.ui-dialog .ui-dialog-title {
    display:none;
}
.ui-dialog .ui-dialog-titlebar-close {
    left:0;
}
.ui-dialog .ui-dialog-content {
    position: relative;
    border: 0;
    padding: .5em 1em;
    background: none;
    overflow: auto;
}
.ui-dialog .ui-dialog-buttonpane { border-width: 0 !important; }
.ui-dialog .ui-dialog-buttonpane .ui-dialog-buttonset {
    float: right;
}
.ui-dialog .ui-dialog-buttonpane button {
    margin: .5em .4em .5em 0;
    cursor: pointer;
}
.ui-dialog .ui-resizable-se {
    width: 12px;
    height: 12px;
    right: -5px;
    bottom: -5px;
    background-position: 16px 16px;
}
.ui-draggable .ui-dialog-titlebar {
    cursor: move;
}
.ui-resizable-handle.ui-resizable-s::before, .ui-resizable-handle.ui-resizable-s::after {
    content: "";
    width: 0;
    height: 0;
    position: absolute;
    left: 150px;
    border-style: solid;
    border-width: 10px;
}
.ui-resizable-handle.ui-resizable-s::before {
    border-color: #aaa transparent transparent transparent;
    top: 2px;
}
.ui-resizable-handle.ui-resizable-s::after {
    border-color: #fff transparent transparent transparent;
    top: 1px;
}
</style>
<script type="text/javascript">//<![CDATA[ 
$(window).load(function(){
$('#open').click(function() {
    $('#dialog').dialog('open');
});
$(document).ready(function () {
    $('#dialog').dialog({
        autoOpen: false,
        resizable: true,
        width: 300,
        height: 'auto',
        buttons: {
            "Save": function () {
            }
        }
    });
}); 
});//]]>  
</script>
</head>