p. 281: In the penultimate paragraph; "characters are not be recognized as markup by the parser" should read "characters will not be recognized as markup by the parser".
p. 283: The sentence:
"The processing instruction target can be any legal XML name (see Chapter 2, XML Fundamentals)."
should read:
"The processing instruction target can be any legal XML name, except
xml in any combination of upper and lower case. See Chapter 2,
XML Fundamentals, for more information."
p. 295-298: The BNF grammar on these pages is pretty badly broken. How badly depends on which printing you have.