I just installed the newest update, as well as Dawnguard, but it seems to have broken my old save games. When I tried to reload my save, it seemed to work fine, but once it gets into the game the screen fades to black, before reappearing with me floating a few inches off the ground. I can't move or interact with anything when it gets like this and I can't save it, it's really weird.

I'm pretty sure it would be a mod issue, but does anyone have any idea how I could fix it. The weird thing is when I started a new game it didn't have this issue and the game works perfectly.

I'm perfectly happy to continue with my new character, it's just annoying not knowing why it happened to my old save.