I'd imagine this would work:

In: newuser.inc.php
Lines: 819-821

Change this:
Code
<option value="" selected="selected">{$ubbt_lang['SELECT']}</option>
<option value="On">{$ubbt_lang['TEXT_YES']}</option>
<option value="Off">{$ubbt_lang['TEXT_NO']}</option>

To this:
Code
<option value="">{$ubbt_lang['SELECT']}</option>
<option value="On" selected="selected">{$ubbt_lang['TEXT_YES']}</option>
<option value="Off">{$ubbt_lang['TEXT_NO']}</option>

Give that a shot...

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