Have a friend who is quite good at preserving foods, keeps an impeccable kitchen, and is an excellent nutritionist; the only person I know who's pie crust I don't question for transfats. She made some very tasty dill pickles from Persian cucumbers (pared the outside straight off) last August that we all shared in September. But the jar I took home and opened yesterday made me sick as a dog. I only had two little bites - terrible headache after a couple hours, sick feeling afternoon, vomiting in the night, more headache and finally I'm OK - just. I should have noted that the liquid was a bit low in the jar. It seemed to be sealed ok. (Also it was a Kerr lid, not Ball -I've seen ancient lids side by side and the rubber on Kerr had changed, the Ball lids looked like new.) There was no cloudiness, they just tasted kinda yucky compared to what I remembered. I never suspected pickles, even after tasting these I didn't think they were spoiled, just not yummy.