This is more of a funny story than anything...
I barely EVER eat ketchup. I keep it in the fridge as a cooking ingredient.
This weekend, I made fries and I was out of mojo sauce so I pulled out the ketchup. Poured it on my plate; took a bite, and it was strange.
Looked at the bottle and it was due in NOVEMBER 2010 LOL! It must have been left in the fridge by my ex haha
Anyway: it was so brown it looked like BBQ sauce. Just a heads-up for anyone else: don't eat the brown ketchup