Error Being Thrown by Category/Tag in Q&A Plugin

The plugin is installed at: http://1smartfamily.com/questions/

One question has been put in:
http://1smartfamily.com/questions/what-is-giftedness/

When I attempt to go the category or one of the tags, such as:

http://1smartfamily.com/questions/categories/gifted/

I get the following error:

Warning: Division by zero in .../wp-content/themes/made/taxonomy.php on line 323

Line 323 of my taxonomy file is:

<?php if($postcount % $cols == 0) { ?> <br class="clearer" /><?php } ?>

The taxonomy file works error-free with at least 3 other custom post types, so it's not a general taxonomy post error. This error is specific to the Q&A plugin.

Please advise soonest.