Would like to hear more about this, if you have any links or info. Was another thread here that linked to a study of plume that found every example they looked at was just a harmless form of mold. They didn't say that they were ruling it out completely, but even after offering a reward, no one sent a single example. I don't remember if they tested anything > 15 years old, though. Really not trying to reopen a plume vs mold debate, just curious if you remember who did the in depth look? I like to learn new stuff.