jquery ui button does not support implicit labels

The jquery ui button does not support implicit labels as described at http://www.w3.org/TR/html4/interact/forms.html#h-17.9.1 like the following.

<label>
<input type="checkbox" />
</label>

See a http://jsfiddle.net/studgeek/8xpYs/ for a live example.

I've looked at fixing it. Modifying it to check for a containing label when defining its buttonElement is straightforward, but there are other parts of the implementation that run into recursion problems. I've played with detaching the input element or moving it outside the label, but worry those approaches may confuse developers. Is there a standard pattern used elsewhere in jQuery UI that would apply here?

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