Checkbox widget seems broken

The checkbox widget in the uicommons module seems broken, it posts false as the value for any unchecked check box. It has a piece of code that specifies a value that gets posted when no selection is made or a checkbox which seems incorrect, i think it should include

<input type="hidden" name="_${ config.formFieldName }">

instead of

<input type="hidden" name="${ config.formFieldName }" value="false">