Thanks for all of the input! I think it may be fermentation.. I was hoping it was something else Regarding the filling temperature, I let it sit at room temperature overnight if not 24 hours. They taste great for the first few days, and then after, they kind of lose their flavor. I thought maybe it could be the temperature of where I store them, but it's a pretty cool room, and the rest of my chocolates are fine. When you say to work on the recipe to reduce the water activity, how do I go about it? For my strawberry filling, I cook them down with a little sugar until it's basically a thick puree (nearly minutes from being a burnt sticky mess... I try to get it as thick as possible). Strain out the seeds and chunks, add it to my ganache, and let it sit. I also have a snowball business here in Kuwait so I have a boat load of flavor concentrates... I usually add a few drops of the strawberry concentrate to give it more of a punch. But I don't think the concentrate is the culprit as I've used it to flavor caramels and they seemed fine as well. Thanks again for the help... I'm kind of lost here. Our storefront opens in less than 2 weeks, and I'm trying to get my inventory up to par, but I've put the fruit filled chocolates on hold in fear they'll just be a big oozing mess.