You said Bethesda, not Bethesda Game Studios. Bethesda Softworks published Brink.
Who cares what they published? It's not their game.
And the 360 version of Oblivion has a potentional game breaking bug as well.
*sigh* Okay look, it's an indisputable fact that the PS3 version of Oblivion and Fallout 3 have more problems than the 360 version; whether it's DLC, bugs, late patches, whatever. Graphics aren't as important as the game functioning properly, and I'm not willing to argue this further.