I have just completed 10234 Sydney Opera House, with one white half-shell (Bricklink: 41749 White Wedge 8x3x2 Open Right) missing.
Both the Bricklink inventory and the Lego instructions show 34 of 41749 and 35 of 41750, so this looks unusual.
Have I misplaced an element, or is this a known quality control issue with this set?