Several questions branch from this topic, that are tangents to TDA Rule 56:
1) what if the dealer exposes a player's downcard(s) after the player has made a bet or raise, but before that bet has been called by anyone. Should the injured player have the option to retract their uncalled bet?
2) what if someone other than the dealer kills a player's hand while that player has a pending uncalled bet (example: the next player muck-tosses his cards and one ends up scrambled into the bettor's downcards): should the injured player be entitled to return of the uncalled bet just as if the dealer had killed the live hand? Recall also the related incident at the 2012 WSOP where Koroknai mucked his own live hand after making a large bet, not realizing Gaele Baumann still had live cards.
I note that Rule 56 doesn't specify "fouled by the dealer", just "If a hand is fouled or the dealer kills a hand by mistake...", so that appears to stretch to cover a hand being fouled by another player? Although at the time it was written, 56 was focused on cases where the dealer mucks live cards by mistake. Is clarification needed for this one way or the other?
These are subjects of the following suggestion thread:
http://www.pokertda.com/forum/index.php?topic=1018.0