CFA Vol. 3 for June 08 test - FSA

Has anyone started doing the practice problems yet? I am starting with this book b/c accounting is my weak point. I do not see anything regarding the errata for Vol 3. on the CFA site but I have found a few errors in the math explanations of the answers. Anyone else finding this? I end up working on a problem for over an hour to find out I was doing it right. Specifically, Reading 35, practice problem 4-C-i for inventory turnover. I would write out the problem but it is very involved.