The public statement is remarkably brief and to the point – if not particularly helpful:
We are investigating an issue of Punkbuster bans that were incorrectly applied to some of our players. Please undertstand that our game advisors are not able to access or overturn Punkbuster bans, but we’re working with our partners at Even Balance to get this resolved as quickly as possible.
EA has used the externally-developed Punkbuster anti-cheating software in its Battlefield games for years now, and intends to use it again in the upcoming release of Battlefield Hardline. A ban in one game means a ban across the board, in all games using the service.
Please stay tuned for updates on this issue, and we’re very sorry for the inconvenience this has caused.