According to seatguru.com, from Row 43 back (not quite ten rows, but close enough if one isn't counting) on AF's A340-300s, the fuselage narrows. Seating changes from eight across (2-4-2) to seven across (2-3-2). That site says it's G they don't use, but it could have that wrong. Could that have been it, or did Orbitz show the row widths correctly?