I just opened a jar of National Brand Mixed Pickle (I believe it is Pakistani). The jar lid was sealed with a plastic strip, with no leakage noted. However, I did not hear that familiar, comforting "pop" sound when I unscrewed the lid and I know better than to assume something is safe to eat just because it "looks ok." This happened before with other chutneys/pickles and I threw them away.
As a matter of fact I once opened a jar of "Coriander Chutney"--I believe it was a brand made in India that is widely available in the international foods aisle at general grocery stores. There was no pop, and then the chutney began to flow out of the jar like lava out of a volcano! It's like it had a life of its own.
Any advice? Or reason why this seems to happen often with Indian or Pakistani brand condiments?