Cap'n Crunch's "Oops" All Berries cereal was released in 1997 and has now been in stores for about a decade uninterrupted. Contrary to what they keep telling you, I'm starting to think it isn't such an "accident" that it's all berries.
It does. It used to be a "limited edition" item, suggesting that they accidentally manufactured nothing but berries on multiple occasions, but now all evidence points to the conspiracy that they're doing it deliberately.