Most of the many corrections on the online corrections page are minor and insignificant (i.e. typos) and would probably go unnoticed by the reader. With press deadlines in technologies being what they are, it is fully understandable. The choice to include those corrections (a) gave me a sense of security in that it demonstrated the author's thoroughness and (b) proves that you don't have to cut a new edition of your work every six months (which can be quite annoying for anyone who is looking to get a specific edition for class).
I was pretty much convinced that it was impossible to design and publish a textbook in a technical field of a caliber such as this. In general, technical authors either confuse the reader by over complicating the layout and material or they put the reader to sleep by being overly shallow and overly redundant. This is not the case for this book. In the words of Goldilocks, this one is "just right". I strongly recommend it to anyone, whether they have a class requirement for it or not.