My wife and I played a game of Forbidden Island last night. She got the Navigator adventurer, and I was the Explorer.
The Navigator's special ability is that it can move any other player up to 2 adjacent tiles. "Adjacent" usually means up/down/left/right, however the Explorer's special ability is that it can move diagonally too, so: Can the navigator move the explorer to adjacent diagonal tiles, or just the standard up/down/left/right?
(I hope the answer is 'yes', as we just managed to win assuming 'yes' to the above with just 2 tiles left when we got off Fools Landing!)