Obviously trivial, but..
After lucas becomes a skull, he gets around $20,000 deposited into his bank account. Later on in the movie, we see lucas typing something on a TYPEWRITER. Yes, it's a movie, and movies are unrealistic. However:
1) I don't care how poor you are, if you can afford to be at college (regardless of scholarship) you should be able to afford some sort of computer.
2) If i received $20,000 for free and I was using a typewriter in college, the first thing I would do is buy a computer.
Like I said, obviously trivial, but it's just something I noticed.