I have two pints of applesauce left from last year and worried they've gone bad. There is little headspace left and I'm sure I left the proper amount, it looks like some stuff has leaked out and accumulated on the threads (and they would have been cleaned following removing the bands last fall), and looking at the jar there are little air pockets that wouldn't have been there at the time of canning. The lids are still popped down snug, but you think this is enough evidence to assume it's bad? Even if not, I think it'd take a whole lot of convincing to tell me it is still good. We've eaten many jars from this batch, btw, and they were all fine... but that doesn't mean they're still fine, right? This isn't too encouraging as this was my first real adventure in canning last fall and with me looking forward to doing my second round as soon as we get enough tomatoes in... but I do have some reason to suspect why there could have been a problem now that I've learned a bit more about canning.