page 9, example 2.3: "2-connected regular" -> "2-regular" page 20, proof of Proposition 3.10: should have \partial instead of d twice in definition of h_j (also, put a factor of z_j into h_j and call them "logarithmic partials"). page 20, later in proof: "minimality" -> "monotonicity" page 20, later in proof: "shows we may move on V ..." -> "shows that if the arguments of h_k and h_l are unequal for some k,l \notin J, then there is a path in V starting at z..." page 28, equation (3.15): "=" should be "\sim". page 30, Theorem 3.29: mean \mu is missing from formula (3.18).