I had picked up on the comment made in the last article I posted in the nukeFEED thread about possible issues with binary data upload. This does look similar. The specific issue was even with Windows version of unicode really being UTF-16 small endian something or other.
(Yes, I don't understand it all yet, but trying to get there.)
I have to be sure that with such wide-spread acceptance that FCK Editor has and active development, that it is probably really good. But, definitely good to keep up with updates I guess.