This page lists errata from the book (hopefully not too much!), changes to the specifications since publication, and brand new features.
Some updates to the Text properties in Chapter 6: Firefox 12 is scheduled to support the
text-align-last property, although it will be prefixed as
-moz-text-align-last; and WebKit browsers have implemented
text-rendering, without prefix, in Safari 5+ and Chrome. The browser support tables have been updated accordingly.
— 28 February, 2012