Index: project.css
===================================================================
--- project.css	
+++ project.css	
@@ -53,3 +53,6 @@
   padding-left: 1em;
 }
 
+.project-clear {
+  clear: both;
+}
Index: project.inc
===================================================================
--- project.inc
+++ project.inc	
@@ -371,7 +371,7 @@
           '#suffix' => '</div>',
         );
         if (!empty($values['clear'])) {
-          $node->content[$section]['#suffix'] .= '<br style="clear:both;" />';
+          $node->content[$section]['#suffix'] .= '<br class="project-clear" />';
         }
         if ($weight >= $max_weight) {
           $last_section = $section;
@@ -383,7 +383,7 @@
     // section didn't already add a clear for itself (e.g. the heaviest
     // section might already clear from hook_project_page_link_alter()).
     if (empty($all_links[$last_section]['clear']) && !empty($last_section)) {
-      $node->content[$last_section]['#suffix'] .= '<br style="clear:both;" />';
+      $node->content[$last_section]['#suffix'] .= '<br class="project-clear" />';
     }
   }
   return $node;