Well probably happened to me at least 5 times now, when you hit tab and then enter to post, like in many other forums, your post will be submitted.
When you hit tab + enter on this board it tabs to the link up to "arcade controls" and hitting enter accesses that link.
Alt+s or p do not work for me, but I don't normally use such shortcuts anyhow.
Not sure if other people have been annoyed by this or not but I wanted to bring it to attention.