Sometimes when I post a quick reply, I get the error message "This forum requires that you wait 10 seconds between posts. Please try again in 9 seconds.", I am placed into Advanced Edit mode, but the post has been made so if I wait the 9 seconds and hit Post I get a duplicate message. Site bug? I'm sure I'm not doing anything wrong....

I'm certainly not double-clicking the Post button (usually use Tab Enter in fact).