diff --git includes/advanced_forum_preprocess_forum_list.inc includes/advanced_forum_preprocess_forum_list.inc
index a59bb54..0dec61d 100644
--- includes/advanced_forum_preprocess_forum_list.inc
+++ includes/advanced_forum_preprocess_forum_list.inc
@@ -30,6 +30,7 @@ function _advanced_forum_preprocess_forum_list(&$variables) {
     $orginal_forums = $variables['forums'];
     $variables['forums'] = array();
     $variables['forums'][$parent_id] = $container;
+    $variables['forums'][$parent_id]->depth = 0;
     foreach ($orginal_forums as $id => $forum) {
       $variables['forums'][$id] = $forum;
       $variables['forums'][$id]->depth++;
@@ -108,7 +109,7 @@ function _advanced_forum_preprocess_forum_list(&$variables) {
 
   
   // Give meaning to $tid for themers. $tid actually stands for term id.
-  $variables['forum_id'] = $variables['tid'];
+  $variables['forum_id'] = isset($variables['tid']) ? $variables['tid'] : 0;
   unset($variables['tid']);
 
   // Fetch the forum statistics.
diff --git includes/advanced_forum_preprocess_forums.inc includes/advanced_forum_preprocess_forums.inc
index 90b85b9..6eeb56b 100644
--- includes/advanced_forum_preprocess_forums.inc
+++ includes/advanced_forum_preprocess_forums.inc
@@ -32,6 +32,7 @@ function _advanced_forum_preprocess_forums(&$variables) {
     // Grab the forum description and make it available to the template file
     $forum = taxonomy_get_term($variables['tid']);
     $variables['forum_description'] = $forum->description;
+    $variables['search'] = '';
   }
   
   // Theme the links core provides us. (New topic, etc)
diff --git includes/style.inc includes/style.inc
index a930643..48931d8 100644
--- includes/style.inc
+++ includes/style.inc
@@ -68,8 +68,8 @@ function advanced_forum_style_lineage($style = NULL) {
   // CSS of one other style and toss it in as a pseudo parent. We do not 
   // follow the path up its parent. The primary use is for adding in the 
   // "stacked" CSS but could be used for other purposes as well.
-  $extra_style = $all_styles[$style]['extra style'];
-  if (!empty($extra_style) && !empty($all_styles[$extra_style]['path'])) {
+  if (!empty($all_styles[$style]['extra style']) && !empty($all_styles[$all_styles[$style]['extra style']]['path'])) {
+    $extra_style = $all_styles[$style]['extra style'];
     $lineage[$extra_style] = $all_styles[$extra_style]['path'];
   }
 
diff --git includes/theme.inc includes/theme.inc
index e599a12..078ca5d 100644
--- includes/theme.inc
+++ includes/theme.inc
@@ -374,4 +374,6 @@ function advanced_forum_preprocess_comment(&$variables) {
  }
 }
 
-  
+function advanced_forum_preprocess_forum_topic_navigation(&$variables) {
+  $variables['prev'] = $variables['next'] = '';
+}