/includes/templates/[your template]/common/tpl_columnar_display.php

There are a ton of unnecessary "?><?php" pairs. That and the "\n" at the end of

Code:
echo '<div' . $r_params . '>' . $list_box_contents[$row][$col]['text'] .  '</div>'. "\n";
are breaking the 3-column display of monthly specials and new arrivals.
If you are experiencing similar problems, take out the extra junk and things should be better.

The meat of my tpl_columnar_display.php now looks like this:

Code:
if($title) echo $title; 

if (is_array($list_box_contents) > 0 ) {
  for($row=0;$row<sizeof($list_box_contents);$row++) {
    $box=$list_box_contents[$row];
    $params = "";
    //if (isset($box['params'])) $params .= ' ' . $box['params'];

    for($col=0;$col<sizeof($box);$col++) {
      $r_params = (isset($box[$col]['params'])) ? (' '.(string)$box[$col]['params']) : '';
      if (isset($box[$col]['text'])) {
        echo '<div' . $r_params . '>' . $box[$col]['text'] .  '</div>';
      }
    }
    echo "<br class='clearBoth' />";
  }
}
Thank you!