Chapter 21

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Page 459
1st para last sentence:  "...application with what you'll learned throughout..." -- grammar/typo?

Page 468
3rd para "..., as shown in Figure 21.8" -- should be figure 21.9

Page 480
I'm running Xcode version 3.1.2.  For program 21.2 Fraction_CalculatorAppDelegate.m, my Xcode generated
[window release] in the dealloc method.  The book's dealloc does not have that.

Also on page 480 at page bottom, Program 21.2 Fraction_CalculatorViewController.m interface file should be .h and it is missing a dealloc declaration. In the Errata list --SK

Page 484
The dealloc method has [window release] -- isn't window in Fraction_CalculatorAppDelegate and is released there? Addressed in Errata list --SK

Page 488
Program 21.2 Calculator.h is missing "-(void) dealloc;" declaration.  [Calculator.m overrides dealloc on page 489]