Maybe you're just having picture problems. It seems there have been some problems lately. If on the place where they should be, your cursor turns into the hand, then there's something on that square even if it seems empty and you're not submiting a board with less pieces but a board where not all pieces are showing. A refresh may reveal those...
(hide) If all of a sudden the site shows up in a different language, just click the flag for your language and it will be back to normal. (pauloaguia) (show all tips)