It was probably written in white/invisible ink :-) If you're using a free service (Yahoo) I'd look there first; make sure my boxes didn't have too much in them, I'd check all my controls and make sure everything including graphics could show, etc. Did you change any of your controls lately for something else? I sometimes forget I've changed something and the next thing that comes in that doesn't "fit" surprises me until I remember and change back. Could be something unrelated to PC or Yahoo too, like your browser controls. Since Yahoo is a web email, your browser gets involved too.