We hate console errors.

builds/4chan-X.js

@@ -6351,7 +6351,8 @@
       });
     },
     node: function() {
-      var ID, post, posts, _ref;
+      var ID, post, posts, _ref,
+        _this = this;
 
       Unread.thread = this;
       Unread.title = d.title;
@@ -6375,7 +6376,9 @@
         $.on(d, 'visibilitychange', Unread.setLine);
       }
       if (Conf['Scroll to Last Read Post']) {
-        return $.on(window, 'load', Unread.scroll);
+        return $.on(window, 'load', function(posts) {
+          return Unread.scroll.apply(_this, posts);
+        });
       }
     },
     scroll: function() {
@@ -6390,9 +6393,12 @@
             break;
           }
         }
+        if (!root) {
+          return;
+        }
         return root.scrollIntoView(false);
       } else if (posts.length) {
-        return Header.scrollToPost(posts[posts.length - 1].nodes.root);
+        return Header.scrollToPost(posts[post.length - 1].nodes.root);
       }
     },
     sync: function() {

builds/4chan-X.user.js

@@ -6342,7 +6342,8 @@
       });
     },
     node: function() {
-      var ID, post, posts, _ref;
+      var ID, post, posts, _ref,
+        _this = this;
 
       Unread.thread = this;
       Unread.title = d.title;
@@ -6366,7 +6367,9 @@
         $.on(d, 'visibilitychange', Unread.setLine);
       }
       if (Conf['Scroll to Last Read Post']) {
-        return $.on(window, 'load', Unread.scroll);
+        return $.on(window, 'load', function(posts) {
+          return Unread.scroll.apply(_this, posts);
+        });
       }
     },
     scroll: function() {
@@ -6381,9 +6384,12 @@
             break;
           }
         }
+        if (!root) {
+          return;
+        }
         return root.scrollIntoView(false);
       } else if (posts.length) {
-        return Header.scrollToPost(posts[posts.length - 1].nodes.root);
+        return Header.scrollToPost(posts[post.length - 1].nodes.root);
       }
     },
     sync: function() {

builds/crx/script.js

@@ -6265,7 +6265,8 @@
       });
     },
     node: function() {
-      var ID, post, posts, _ref;
+      var ID, post, posts, _ref,
+        _this = this;
 
       Unread.thread = this;
       Unread.title = d.title;
@@ -6289,7 +6290,9 @@
         $.on(d, 'visibilitychange', Unread.setLine);
       }
       if (Conf['Scroll to Last Read Post']) {
-        return $.on(window, 'load', Unread.scroll);
+        return $.on(window, 'load', function(posts) {
+          return Unread.scroll.apply(_this, posts);
+        });
       }
     },
     scroll: function() {
@@ -6304,9 +6307,12 @@
             break;
           }
         }
+        if (!root) {
+          return;
+        }
         return root.scrollIntoView(false);
       } else if (posts.length) {
-        return Header.scrollToPost(posts[posts.length - 1].nodes.root);
+        return Header.scrollToPost(posts[post.length - 1].nodes.root);
       }
     },
     sync: function() {

src/features/monitoring/unread.coffee

@@ -26,7 +26,9 @@ Unread =
     $.on d, 'ThreadUpdate',            Unread.onUpdate
     $.on d, 'scroll visibilitychange', Unread.read
     $.on d, 'visibilitychange',        Unread.setLine if Conf['Unread Line']
-    $.on window, 'load',               Unread.scroll  if Conf['Scroll to Last Read Post']
+    if Conf['Scroll to Last Read Post']
+      $.on window, 'load', (posts) =>
+        Unread.scroll.apply @, posts
 
   scroll: ->
     # Let the header's onload callback handle it.
@@ -35,10 +37,11 @@ Unread =
       # Scroll to before the first unread post.
       while root = $.x 'preceding-sibling::div[contains(@class,"postContainer")][1]', Unread.posts[0].nodes.root
         break unless (Get.postFromRoot root).isHidden
+      return unless root
       root.scrollIntoView false
     else if posts.length
       # Scroll to the last read post.
-      Header.scrollToPost posts[posts.length - 1].nodes.root
+      Header.scrollToPost (posts[post.length - 1]).nodes.root
 
   sync: ->
     lastReadPost = Unread.db.get