These itneriors look pitch-black when you visit them on vanilla engine (on some video cards). Allegedly, due to the fact that their Fog value is 0 0 0:
Nalvos Omayn is the target of a Morag Tong writ. He might very well be dead by the time the player does The Statue. Dialogue should account for this case, locking out the 'steal the statue' route of solving the quest.
T_MwDe_Furn_ChS2IngNars, a small chest, uses the levelled list T_Mw_Random_IngredientNarsis. This can contain multiple large kwama eggs which don't really fit in a small chest.
As it says in the title, the basement of Ramaran Manor is missing its "Illegal to Sleep" check. This is a standard guarded basement, not a dungeon, and should be illegal to sleep.