Been here for 3 years and haven't experienced any racism. I'm a black guy. Although, what the posters above have said is true. There really is a divide between races. There are some groups that mix, but you can't help but notice the large amounts of people that hang around their own race. I found it strange when I first got here, but you get used to it. Still, it would have been nice if more people mixed together.
The uni is very nice and laid back, though. Never seen any problems around campus.