Input add-on with tooltip removes rounded corners

Created by: jc-white

<div class="input-append">
    <select class="input-medium required">
        <option value="">--Select--</option>
    </select>
    <span class="add-on">Test</span>
</div>

$('span.add-on').tooltip({
    placement: 'bottom',
    title: 'Test'
});​

Using this code, the tooltip will work fine, but the rounded-corners will be removed from the span.addon due to this selector:

.input-append .last-child, .input-append .btn:last-child {
    -webkit-border-radius: 0 3px 3px 0;
    -moz-border-radius: 0 3px 3px 0;
    border-radius: 0 3px 3px 0;
}

When the span.addon is hovered over, it is no longer the last child and thus the selector is instead applied to the tooltip div. My suggested fix for this (IE8+, FF3.5+, CH2+) is below:

.input-append .add-on:last-of-type, .input-append .btn:last-child {
    -webkit-border-radius: 0 3px 3px 0;
    -moz-border-radius: 0 3px 3px 0;
    border-radius: 0 3px 3px 0;
}

JSFiddle