HTML Validation fail – ‘Selected’ injected twice

Hi, I’m using the currency switcher and when I check validation, I see that the element for the current item (in the select menu), has:

<option value="US" selected='selected' selected='selected'>United&nbsp;States&nbsp;dollar&nbsp;($)</option>

You see how selected=’selected’ is appearing twice. The PHP only has a single line to generate each select item:

<?php foreach ($options as $key => $value) : ?>
    <option value="<?php echo $key?>" <?php echo selected($key, $selected_country ); ?>><?php echo $value; ?></option>
<?php endforeach; ?>

So it must be injecting it in twice elsewhere in the plugin.

Funcitonality is fine, but it’s the only error in my validation check so my OCD is going nuts. ??