{if $smarty.request.entry}
{* permalink style here *}
{else}
{* normal here *}
{/if}
For future releases (if it's not a problem) what about a widgets.conf.php file for each theme? So each theme would have it's configuration, and there won't be problem if someone changes his theme... (I'm not changing style everyday, so there's no problem, but could be an idea...)
It looks like you're new here. If you want to get involved, click one of these buttons!