At risk of being directed to use the 'existing thread', I was wondering whether anyone had any ideas as to why the Dawnguard DLC should be so problematic for Bethesda. Best theory I've heard is that they've been unable to use the somewhat heavy processor vs. GPU bias of the PS3 to advantage, a problem they were able to workaround with the original game release, but which has become more difficult within the limited resource frame of DLC.
Again, I would appeal to the moderators to grant that this is a topic worthy of a new thread, leaving aside any questions of PR, customer satisfaction, exclusivity agreements and suchlike. As a tech. semi-literate I would be curious for any enlightenment... I imagine many others, PS3 owners or not, would be too.