Tiny bit of mold on maple syrup—can I still bottle it?
Not many molds can live in a substance with such a low water activity. They call those things "xerophiles": they're the food equivalent of those bacteria that grow in cyanide and lava and crap like that...Foodie extremophiles.

These are probably some kind of wallemiomycetes. I can't find any information on whether or not they're toxic, but, generally if you have any kind of mold infestation, it will affect the taste.