So far it seems I have been quite fortunate and no major mistakes have been pointed out in the book. If you do spot anything, please email me to let me know.
1) The answer to Exercise 1.3 (page 216) should be EA not DA.
2) On a number of circuits I claim to use a 1N1418 diode to connect to the MCRL pin. This should be the 1N4148 diode.
3) On page 230: Bit assigments for the OPTION register, Bit 7 should be 0 for "Enabled" and 1 for "Disabled".