Updating to Shivering Isles-Oblivion

[refraction]

you might need to start a new savegame. I doubt its due to fault of the NOCD. but more likely due to any mods you may have had installed at the time of making yours save.

all i can suggest is install oblivion (with no mods), load up your last save, jump to a big city if you arent in one, then save it again and update to Shivering Isles.