You know, there are the usual tricks...
Look whether the bug is save-dependent (i. e. you only have it with your new saves, or all other saves are bugged too). If yes, go back to an earlier save, and post the buggy save here in the forum (you can find your savegames in [Your "My Documents" folder]\My Games\Oblivion\Saves).
If no, try deleting your Oblivion.ini, and if not even this helps, reinstalling Nehrim.