Via the BBC (h/t Talk Islam):
The president of a London university atheist society has resigned over a row about an image of the Prophet Muhammad.
The society at University College London (UCL) published an image on its Facebook page showing "Jesus and Mo" having a drink at a bar.
The atheist group was asked by the UCL union to remove it, but refused and started a petition defending its freedom of expression.
A student Muslim group began a counter-petition asking for its removal.
(source)