That usually only happens when an excessively long word is entered - ie, a word longer than the width of the posts on your screen. Then it will push the right column off the screen.
(hide) Play a game in real time with an online opponent! For this to be possible, you and your opponent have to select the action "Move and stay here" as default and then reload the page with the F5 key! (TeamBundy) (show all tips)