We have been made aware of some problems for players who have downloaded the title digitally as opposed to having a disc based game on hand. The digital copy of Super Street Fighter IV isn’t being prompted for a title update when you sign on to the game. In turn, this makes the newly released DLC error out “Data is corrupt”. There is nothing wrong with the DLC you bought, it just can’t activate in game.
Capcom Europe responded on twitter saying a fix is in the works and will be up shortly.
NINJA EDIT: Looks like the PSN AE Download is up and ready to go, you might have to search for it in the store to see it.