Please be advised, Slipknot's 'off-fest' performance on August 6th at Cumberland Co. Civic Center in Portland, ME has been canceled... The rest of the show will go one that night, meaning Papa Roach, Linkin Park, Disturbed, and Mudvayne will be performing. No further information is known. As/if we hear more, you will be the first to know. apologies for any inconvenience.