I've also got a problem with the save file becoming bloated. It was all fine up until I started the quest where you have to retrieve the blood rings (save file of around 9MB), but now whenever I save it grows by about 150KB. It reached over 50MB before I noticed something was wrong. It's also causing a bug whereby if I turn in to a vampire lord, the animation won't trigger, and I basically get "stuck" in my normal form without being able to access any of the menus. I also can't save when I do manage to transform in to a vampire lord (not sure if this is meant to be the case though). I've tried disabling all my mods to no avail. Even if I go back to a much older save it still starts becoming bloated. However if I load a game that I haven't played Dawnguard with, it's fine. Yes this is exactly what is happening to me!!! My vampire lord is very buggy either it takes too much time to transform or I get stuck where I cannot access the charater menu. My save file will start to bloat in the mission where we find valerica in the soul cairn. goes from 13mb to 19 and then the 50s by the end of the questline. Soon enough I will get a CTD every time I load the save. I find this size to be around 130mb range. I reload to a save on my character where I had setup to start the DLC and in the end I keep on getting bloated saves. I've done everything possible except just start a brand new file, but Ive invested so much time in my main file that I really don't want to if I dont have to. Im currently just playing my file in the mission before the soul cairn and I am fine no bloating no nothing, I have dona all the side missions for the DG and can still install mods fine. but once I start that mission then it all goes to S***