diff --git a/boards/views/api.py b/boards/views/api.py
--- a/boards/views/api.py
+++ b/boards/views/api.py
@@ -38,7 +38,10 @@ def api_get_threaddiff(request, thread_i
 
     thread = get_object_or_404(Post, id=thread_id).get_thread()
 
-    filter_time = datetime.fromtimestamp(float(last_update_time) / 1000000,
+    # Add 1 to ensure we don't load the same post over and over
+    last_update_timestamp = float(last_update_time) + 1
+
+    filter_time = datetime.fromtimestamp(last_update_timestamp / 1000000,
                                          timezone.get_current_timezone())
 
     json_data = {