10th year. 27th - 29th May.
Tickets already on sale at Seetickets (even though there is no mention of it on the Primavera website). It was first listed on Seetickets as Primavera featuring Pavement, so I'm thinking they'll be there.
Also, previous atttendees can log into the site and vote for their top 5 artists from the years they attended. The festival will approach the most popular acts to play again in May.