. not DNA-specific, but interesting: I do my tree-building in FTM on my PC, so I rarely look at my tree on ancestry.com, but I just did, and find that some of the furthest-back bits had flashing green "potential mother" boxes hanging off the "oldest known ancestor"-I guess I'm being told the equivalent of the "little green leaf" hint, but more useful, because, about an "older" ancestor I didn't have in my tree at all. FYI, FWIW. Best, Eric