Index: sites/all/themes/fusion/fusion_core/template.php
===================================================================
--- sites/all/themes/fusion/fusion_core/template.php	(revision 30)
+++ sites/all/themes/fusion/fusion_core/template.php	(working copy)
@@ -249,6 +249,15 @@
     $sidebar_last_width = (block_list('sidebar_last')) ? theme_get_setting('sidebar_last_width') : 0;
     $regions = fusion_core_set_regions($grid_width, $sidebar_first_width, $sidebar_last_width);
   }
+  
+  // Add regions that are defined in sub-themes
+  if (FALSE === isset($regions[$vars['block']->region])) {
+    $regions[$vars['block']->region] = array(
+      'width' => $grid_width, 
+      'total' => count(block_list($vars['block']->region)), 
+      'count' => 0
+    );
+  }
 
   // Increment block count for current block's region, add first/last position class
   $regions[$vars['block']->region]['count'] ++;