1. In the list of errata

http://www.markjoshi.com/concepts/errata2pt2.txt

it says "Page 173, equation (6.121), move final ) in the numerator to be

directly after the log (ie so first fraction is the argument of the log)

eqn (6.117) argument of last exponential is

{-\frac{1}{2} \sigma^2 T + \sigma \sqrt{T} X}"

In my version of the book at least, this refers to (6.119) rather than (6.117).

2. Also in

http://www.markjoshi.com/concepts/errata2011.txt

it says

page 170 about half-way down, in equation before "Give an event" change D_T to C_t

I think you meant C_T here rather than C_t.