User blog comment:G0LD3NF1RE/Dawnguard encounters issues with Playstation/@comment-67.189.230.26-20120927234528

Actually Bethesda has made it clear that the problem lies within the size of the save game files that grow to over 10-15 megabytes, making the game virtually unplayable when you start to make progress. They fixed this issue with a patch, but with the addition of a sizable dlc, it only accentuates the performance issues they had before the patch. They have it on the console, the issue now is finding a way to get it to run smoothly. Incompetent programmers? Maybe. But no "back room deals" with Microsoft I assure you.