fixes #1730

app/models/post.rb

@@ -450,10 +450,12 @@ class Post < ActiveRecord::Base
           end
 
         when /^rating:([qse])/i
+          unless is_rating_locked?
             self.rating = $1.downcase
           end
         end
       end
+    end
 
     def has_tag?(tag)
       tag_string =~ /(?:^| )#{tag}(?:$| )/