Ok, first off, no pics yet, can't seem to get a good closeup of it, ust wanted to know if anyone has came across others.
Was looking through change and came across two 2008 D dimes that have what at first appeared to be a die gouge, but then I came across another one where the blob of metal wasn't as big, which makes me think it's a die crack. It's on his chin, at the lower end of the wrinkle to the left of his mouth. It is definatle a raised blob of metal on both, with no PMD near it. As mentioned, one is smaller, and the second one is about twice the size.
Let me know your thoughts, and I'll get a pic as soon as I can.