I hope this isn't repetitive (I did search and only found one post mentioning the errors, but from before the corrections were posted).
The Knitty Gritty Knits book is FULL of errors. While almost all books have errors, this has a very high number. Nearly one in every pattern. Vickie Howell was really embarrassed by it and posted about it on her blog. Apparently, she didn't have as much to do with the book as it would seem.
Anyway, the corrections have been posted: http://vickiehowell.com/KGErrata.html
Hope this helps someone.