스킨의 list.php 파일을 수정해주세요.

<td class="kboard-list-thumbnail"></td>

위 코드를 아래 코드로 변경해주세요.

<td class="kboard-list-thumbnail"><?php if($content->thumbnail_file):?><img src="<?php echo kboard_resize($content->thumbnail_file, 120, 90)?>" style="max-width: 100px;" alt="<?php echo $content->thumbnail_name?>"><?php else:?><i class="icon-picture"></i><?php endif?></td>