I've been noticing more recently that I'll get a duplicate text or two. It comes 15 min after the first, and if there's a second duplicate that's 30 min after the initial duplicate. Haven't seen third duplicate yet. If I reply it doesn't send a duplicate. This mostly happens with my girlfriend who has an iPhone, but also with my friend who has an original Atrix. This started happening before the Jelly Bean update so I don't think it's that.