I just took a look, and mine looks pretty straight. Of course, mine might have straightened itself a little too, since the head is pushed down a good quarter-inch further than where it was originally hafted, from thrusting at solid targets at WMAW.
I'm a little surprised that yours isn't straight, actually. Since the haft goes all the way through the head, I suppose either the haft might have a bend at that point, or the head was bored out at an angle?