Catregory doesn’t show up in post caption

I’m using a modified version of Minima Plus on WP 2.0.4 (www.wmccnews.com). The category of each post used to show up immediately under each post caption. But no longer.

This code is in index.php:

<?php if ($single) { ?>
<p class=”post-footer”>
<?php the_category(‘, ‘) ?>

<?php } ?>

(The last line may relate to prior code. In any event, taking it out results in an error message.)

Thanks.