http://www.reddit.com/r/LeafCoin
Until the new logo is chosen, the old logo should be used in all communication.
People get confused and don't take a product seriously if it is not consistent.
That logo is on the official site, hence it has been used until the new logo is chosen.
I have the best intentions with Leaf but the corporate identity of Leafcoin is all over the place.
On the official website it's not clear that we are even talking about a (Crypto)Coin, only LEAF is mentioned.
I think, again, until the new logo is chosen the original logo should be used for everything.
Just my opinion...