As far as I can tell, this wasn't working at all.

builds/4chan-X.user.js

@@ -9451,11 +9451,9 @@
         posts = Object.keys(Unread.thread.posts);
         root = Unread.thread.posts[posts[posts.length - 1]].nodes.root;
       }
-      return $.on(window, 'load', function() {
+      if (Header.getBottomOf(root) < 0) {
-        if (Header.getBottomOf(root) < 0) {
+        return Header.scrollTo(root, down);
-          return Header.scrollTo(root, down);
+      }
-        }
-      });
     },
     sync: function() {
       var lastReadPost;

builds/crx/script.js

@@ -9434,11 +9434,9 @@
         posts = Object.keys(Unread.thread.posts);
         root = Unread.thread.posts[posts[posts.length - 1]].nodes.root;
       }
-      return $.on(window, 'load', function() {
+      if (Header.getBottomOf(root) < 0) {
-        if (Header.getBottomOf(root) < 0) {
+        return Header.scrollTo(root, down);
-          return Header.scrollTo(root, down);
+      }
-        }
-      });
     },
     sync: function() {
       var lastReadPost;

src/Monitoring/Unread.coffee

@@ -46,11 +46,9 @@ Unread =
       # Scroll to the last read post.
       posts  = Object.keys Unread.thread.posts
       {root} = Unread.thread.posts[posts[posts.length - 1]].nodes
-    # Prevent the browser to scroll back to
+    
-    # the previous scroll location on page load.
+    # Scroll to the target unless we scrolled past it.
-    $.on window, 'load', ->
+    Header.scrollTo root, down if Header.getBottomOf(root) < 0
-      # Scroll to the target unless we scrolled past it.
-      Header.scrollTo root, down if Header.getBottomOf(root) < 0
 
   sync: ->
     lastReadPost = Unread.db.get