I once met somebody that had a lot of trouble storing canned goods (like stuff canned in glass jars) in their basement. They were dead certain that stuff in jars in their basement would go bad, but stuff in the kitchen would not.
I imagine that would largely be due to humidity. If relative humidity in the basement was high enough, maybe from a faulty water heater, mixed with a slight weak spot in the jars seal. The upstairs cupboard might be dry enough that said weak spot in the seal would be relatively stronger........preventing spoiling for significantly longer.
Or I might be completely wrong......that's just what popped into my head, based on experience.
The Tacoma Permaculture Project www.tacoma.freeforums.org
My grandparents kept all their canned goods in the basement. I think humidity would be the determining factor. They lived in South Dakota and didn't have near the humidity that we have here in Oklahoma. We can't have basements around here anyway. shucks.