lol I like it. Just kidding. All joking aside, have you tried logging out and logging back in? Are you using a custom ui?
I had this happen to my Monk prestige tree a few weeks ago, it has since cleared up though (might be related):
That wasn't a great picture of what's wrong. The big triangles and dots are all moving. I've been trying everything I can think of for 3 days, a new video card is my next step. Whatever this bug is seems to be also affecting other windows graphics.