Julie, look at that text of yours. I suspect the truncation took place right after that ninth word due to some punctuation mark or irregular character. Once you cut and paste the text onto the post box, you'll have to go over such characters, replacing them from your keyboard. This is a pain-in-the-ass workaround and worth doing only if you are really keen on posting that stuff.
Quanto, although my IE6 botches the shoutbox, it includes the horizontal bar you posted as missing. Microsoft giveth and Microsoft taketh away.