ddes, could you please provide the model of the Bluray player that you are using? And the versions of the drivers that you have tested with?
asichacker, could you please provide the model of the system being used, driver versions installed for video and bluray players?
Additionally, both of you, please provide the version of the of the software that you are using to play the Bluray and post here the dxdiag report from the system affected. To get the report, check on start menu, type dxdiag, enter and press on save all this information.