Here are the others (please fill in the gaps everyone!):
Season 1, Leg 1 (Zambia): Roadblock that involved cooking an ostrich egg. Both team members then had to eat it.
Season 5, Leg 8 (Dubai): Roadblock that involved buying nuts from a market and delivering them to a ship.
Season 5, Leg 13 (Canada): Task that involved choosing to buy either a jacket or gloves for use in the rest of the leg.
Season 5, Leg 13 (Canada): Roadblock that involved building a teepee outside Banff Springs Hotel.
Season 10, Leg 4 (Vietnam): Yield at the Hydrofoil Harbor was unaired, presumably due to no one using it.
Season 10, Leg 7 (Mauritius): Roadblock was present, but unknown.
Season 11, Leg 7 (Poland): Roadblock involved rowing into the reflecting pool in the middle of the palace. Other details are not known.
Season 12, Leg 5 (Lithuania): Fast Forward was present at Trakai Island Castle, but was unused.
Season 13, Leg 3 (Bolivia): Task at Mercado Rodrigues, details unknown.
Season 14, Leg 7 (Thailand): Fast Forward involved buying items for a local orphanage, but was not taken.
Season 14, Leg 9 (China): Task involved climbing the Peak of the Luminous Moon and playing the 'Drums of Life'.
Season 14, Leg 10 (China): Jaime & Cara won jetskis for coming 1st at the midpoint, but this was not mentioned on air.
Season 15, Leg 4 (Cambodia): The first prize was motorcycles and was awarded to Zev & Justin before they realised they were missing their passports.
Season 15, Leg 11 (Czech Republic): Brian & Erika incurred a 30 minute penalty for writing down the letters during the Roadblock. This did not affect their placement.