I came across this same problem in a tournament last night.
There were 4 clubs on the board, two of which were A and K.
I had an 8 of clubs.
Assuming the other 2 people still in at this point had clubs as
well, and I could still possibly
bully people out, I went all in, assuming I would split the pot with whoever stayed in with me.
We flipped our cards over, and the only person that stayed in with me had the Queen of clubs, and she started reaching for the chips.
I said, "We split them, cause we both had Ace high flushes", and of course she disagreed. I know for a fact that for example Party Poker.net splits the pot when this occurs. I'
m pretty sure (although I can't say for 100% sure) that I've seen this happen on tournaments on TV.
Anyway, they asked the tournament organizer and he said the same thing. It goes down the
line to the next card. So I had to leave the table.
I still think it was bullshit though.