Oh, what a pain, Umbral! I remember having a friend/co-student who told a horror story of a professor (this was in an online course) who just "disappeared" and didn't grade or turn in grades for the final! It took months for our current professor, who was the head of that department to straighten it out they said. The professor was teaching from Japan and had just ceased/moved or something and didn't notify the school or anything so administration was hard-pressed to help.

You'd better get an "A" after this!