Folks from Triumph Learning called today (I'd hoped to speak to someone yesterday from the textbook publisher) and they confirmed that indeed, the scanned version of the problem that appeared in the photo is from the first edition of their textbook and was corrected for the second printing in April, 2008. The text is now in its seventh printing.
If there's a cautionary tale in all this for teachers, it's this: ask the publisher's permission to scan pages for projection on a Smart Board so you don't get caught with out-of-date information. But again, the problem the girl in the photo was asked to solve, and in fact did solve, is not the problem that appears on the board. The kids have the updated textbooks, it's the scanned version that was out of date.