The other day I discussed this briefly with someone I met who works for a Latin American policy think tank in DC (the Inter-American Dialogue, I believe). She commented that they think at this point the official story is just the "official" story, and that the decision to use the emblem came down from MUCH higher up.
For the purposes of this conversation, I suppose that's only hearsay. But I just wanted to mention there's some significant doubt regarding Uribe's statement going around in pretty well-informed circles....though I imagine that's not really earth-shattering news to most.