diff --git a/classes/ComicPressComicPost.inc b/classes/ComicPressComicPost.inc
index e2a6287..733397e 100644
--- a/classes/ComicPressComicPost.inc
+++ b/classes/ComicPressComicPost.inc
@@ -206,9 +206,6 @@ class ComicPressComicPost {
 
   function get_parent_categories() {
     $parents = wp_get_post_categories($this->post->ID);
-    do {
-      $parents
-    } while ($parents_found);
   }
 }
 
diff --git a/classes/ComicPressNavigation.inc b/classes/ComicPressNavigation.inc
index bc83178..06f8608 100644
--- a/classes/ComicPressNavigation.inc
+++ b/classes/ComicPressNavigation.inc
@@ -18,10 +18,8 @@ class ComicPressNavigation {
     }
 
     // global first/last
-    if ($root_category = $this->_storyline->root_category) {
-      foreach (array('first', 'last') as $field) {
-        $nav[$field] = $this->_dbi->{"get_${field}_comic"}($root_category);
-      }
+    foreach (array('first', 'last') as $field) {
+      $nav[$field] = $this->_dbi->{"get_${field}_comic"}(null);
     }
 
     if ($category = $this->_storyline->get_valid_post_category($post->ID)) {
diff --git a/test/ComicPressNavigationTest.php b/test/ComicPressNavigationTest.php
index a135904..fa484fc 100644
--- a/test/ComicPressNavigationTest.php
+++ b/test/ComicPressNavigationTest.php
@@ -30,8 +30,8 @@ class ComicPressNavigationTest extends PHPUnit_Framework_TestCase {
 
     $dbi->expects($this->at(0))->method('get_previous_comic')->with(null, $post);
     $dbi->expects($this->at(1))->method('get_next_comic')->with(null, $post);
-    $dbi->expects($this->at(2))->method('get_first_comic')->with(1);
-    $dbi->expects($this->at(3))->method('get_last_comic')->with(1);
+    $dbi->expects($this->at(2))->method('get_first_comic')->with(null);
+    $dbi->expects($this->at(3))->method('get_last_comic')->with(null);
     $dbi->expects($this->at(4))->method('get_previous_comic')->with(2, $post);
     $dbi->expects($this->at(5))->method('get_next_comic')->with(2, $post);
     $dbi->expects($this->at(6))->method('get_first_comic')->with(1);