I just finished the chapter and on page 388, 1st paragraph, there are some misspellings. “outlt” should be “outlet” and “See” should be “Set”.
Also, just a comment about the Control Drag to “xxx.h” files. In that paragraph and the second one on that page, you reference dragging to the “interface declaration” and then to the “properties section” as if they were different. If one was to establish a separate “ivar” section with braces in the class declaration, that makes more sense. But even the figure (30.8) you show on page 389 shows establishing the outlets as properties instead of the older method of establishing them as variables/objects and then establishing properties for them. I realize it is just a change in the way Xcode works now but not having to establish the variables/objects before establishing properties probably needs to be reinforced earlier in the book a couple of times. (I remember it was mentioned once somewhere back in the early chapters.)
All in all, updating from an earlier book that addressed all the things that are no longer necessary in Xcode 4.2 & Lion, you guys did a very good job.