User blog comment:G0LD3NF1RE/Dawnguard encounters issues with Playstation/@comment-5488606-20120908013711/@comment-5485229-20120910041928

Even the 360 has game breaking glitches in Dawnguard. You may get to the point where you have to read an Elder Scroll for part of a quest and it will never work, reload a save to re-acquire the Elder Scroll and it is still glitched. Reload a save from before you even start Dawnguard and I don't know...