diff --git a/boards/mdx_neboard.py b/boards/mdx_neboard.py
--- a/boards/mdx_neboard.py
+++ b/boards/mdx_neboard.py
@@ -159,8 +159,10 @@ def bbcode_extended(markup):
             u'<span class="comment">//%(value)s</span>')
     parser.add_simple_formatter('spoiler',
             u'<span class="spoiler">%(value)s</span>')
+    # TODO Use <s> here
     parser.add_simple_formatter('s',
             u'<span class="strikethrough">%(value)s</span>')
+    # TODO Why not use built-in tag?
     parser.add_simple_formatter('code',
             u'<pre><code>%(value)s</pre></code>', render_embedded=False)