There is a alternate English dub done by Animax Asia that was dubbed in Hong Kong. In this dub the opening credits are left in it's original Japanese, the title cards are in Japanese with a English voice over translating the title card, and there is no profanity in the dub.
The episodes that aired in the USA on Toonami is censored for violence, blood and has profanity dubbed over.
The episodes that aired in the USA on Adult Swim are partially edited.
FUNimation released some volumes on VHS (and a few volumes of the Chapter Black saga on DVD) in a edited censored format, which is the Toonami version aired on Cartoon Network.