The actual bin list for anybody unsure: green, black, pink or fuzzy mould. Note that a white powdery look is the bacteria and is normal, so do not throw out a good pack over that. Also dry crumbly gritty beans with a lot of crystal-like white spots, slimy liquid that is not the usual sticky threads, and sour or rotten smells rather than the earthy funk.
For anybody making it at home: strong ammonia means shorten the ferment or drop the temperature, and resting it in the fridge for a day afterwards calms it down noticeably.