I'll chime in as well. For years, I had lower back problems. Eventually, I asked my chiropractor about doing deadlifts. He was not opposed to them, although he did mention that he sees about one or two people a month who come in after hurting their back deadlifting with shitty form. I find this surprising, because I find it hard to find one or two people who deadlift at my gym, never mind finding people who deadlift heavy (everyone does 135 lbs).
Anyway, long story short: I started doing deadlifts. Initially, I started pretty damn light using a powerlifting routine from M&F. Even with just that program, my back problems came back less and less.
These days, I never have any back soreness unless it's muscle soreness from working out. In fact, the only time I ever tweak my back is when I do squats, so it's still obviously not my strongest muscle group.
Deadlifts kick ass, but I also think good mornings should get some props.