I help designers improve their games.
One rules question came up that I don't think was answered by the rules book.
What happens if a player smears and causes a tie they are not involved in?
Example: Player A plays a Yellow 3. Player B throws off with an Orange 6. Player C smears with a Red 3, and then plays an Orange 4.
The rules talk about when a player causes a tie by playing for themselves, but I don't think this was covered. We ruled that the original player (in this case, Player A) could choose. We felt that if Player C chose, then it gave a lot of control to that person. But, I honestly don't know.
I'd say that the player whose card caused the tie (player C) breaks all ties (even if not involved).
But the rules are admittedly not quite clear on this corner case!