True. I'd also propose old legumes. When they're a few months old, the seed's "skin" produces some polysaccharides that somehow disrupt the gut flora and cause megaton-level farts. "New" legumes don't cause so many farts, but they're usually more expensive.
So this could be caused by a change in providers, a way of cutting corners or a simple lack of foresight by the company.
I also agree with other fellow commentards that pointed to the lack of quality control.
Biting the hand that feeds IT
