The Pet Sounds Arena was introduced in 2006, with a capacity of 8,000. It replaced the 2,000 capacity X-Tent, which became the Futures Stage the year previously. Kasabian were added as Sunday headliners of the stage, announced 24 hours before the festival began.
Tickets for the 2006 festival went on sale at 9am on 17 February 2006. The event sold out in under an hour, a record time for the festival. An additional 12,000 day tickets were placed on sale on 3 June 2006, which sold out in ten minutes. Approximately 69,000 tickets were sold for each day. Following the sellout, weekend camping tickets appeared on internet auction sites for as much as £700.