You always have ALT codes for it. Or use alt+U+[letter to be given an umlaut] if you have a Mac.Death-of-Penguins said:Wow. That's... yeah. Well, tell him we're sorry for misspelling the English language that Americans must've come up with.
Also, my Captcha has a word with an umlaut. This bugs me, 'cause I don't have a German/other language with umlaut privileges keyboard.
OT: OK, so he's a douche. I say bring it up with someone above him if it troubles you that much. Or perhaps you could talk to your professor about it?