It can't display Bio F.R.E.A.K.S.'s text properly.
It can't display the background images in Mario Kart 64 properly.
It messes up on some of the UI art in Automobili Lamborghini.
It has a strangely offset screen in The New Tetris and the Rampage games.
It hangs on the first frame in Banjo-Kazooie.
It also can't boot a number of games; those including Chameleon Twist, Perfect Dark, GoldenEye 007, Banjo-Tooie, Conker's Bad Fur Day, Resident Evil 2, Indiana Jones and the Infernal Machine, Star Wars Episode 1 - Battle for Naboo, Yoshi's Story, and many others.
At this point, I think it might be best for anyone interested in contributing to the N64 driver to look into the main CPU or machine/n64.c-related issues keeping these games from booting.