The gist of it is that La Vanguardia and El Periodico de Catalunya omit a paragraph that El Pais misquotes. The original apparently says "the armed actions of 11 March", while El Pais trascribes "the attacks of 11 March".

I have found at least one comment on an online discussion board gleefully pointing out that the fact that 11 March is mentioned is bad for Zapatero.

guaranteed to evoke a violent reaction from police is to challenge their right to "define the situation." --- David Graeber citing Marc Cooper