X Factor: If no deadlock then what?

With the overhaul to the voting this year, the producers have apparently done away deadlock in the event of the judges not being able to agree on who should be saved after the singoff.
If this is the case, then what do you think they will do instead, as it seems very possible that a Shelley/Lorna bottom two could get a two-way split from the judges?
Do they simply base it on the result of the earlier flash vote (so Shelley would go)? Or do they give someone the all-powerful deciding vote? Or do they give the public the power with another flash vote?
Maybe they'll just give the contestants a couple of swords and let them fight it out.