The episode 403 of One Piece with English subtitles was leaked to video sharing websites. The episode was supposed to be streamed on FUNimation channel on May 30th at 9:00 pm central, one hour after the airing in Japan. The leaked file was downloaded from FUNimation server by illegal access.
Source: Anime!Anime!
Update
FUNimation released a statement regarding the leak. The simulcast will be suspended for the time being.
FUNimation official blog
Related topic: One Piece to Be Broadcasted Simultaneously Starting from the Episode 403
Update2
FUNimation will resume the streaming of One Piece on August 21st. The suspended episodes from Episode 391 will be aired for free. The simultaneous streaming of the newest episode will be resumed on August 29th from Episode 415.
Source: Anime!Anime!
