User blog comment:G0LD3NF1RE/Dawnguard encounters issues with Playstation/@comment-66.182.205.125-20120902221257

From what I've heard is that the problem is the RAM. Skyrim is (apparently) already taking up a lot up RAM, and trying to fit Dawnguard in what little is left is being difficult. Either they figure out how to do it or give us PS3-exlusive DLC as compensation.