I was in a recent game, this it what happoned...
Player A landed on Player B and cast toadify
Result was Player A becomes toad
Next turn player B wants to pick up the loot, so tries to cast teleport to land on the space he is already on.
Our Gamesmaster ruled this as invalid, as to teleport to your starting place means you havn't moved. And all that was needed was to move away this turn and teleport next turn to claim the loot.
Player C then rolled the exact die roll required to fight the sentinal on the way through to the middle region and land on the loot himself.
So the question, should player B have been allowd to teleport to the space he started his turn in ?