Ooh, found another one, a fairly tiny detail that might not actually be a problem. During the early days of Simon's route, when he is mostly naked, his portrait still shows clothes in the menu, or during dialog where his portrait shows up (like with clocks and documents in the lower offices). I only bring it up because other character's portraits do change based on stuff like this at other points in the game, like Orcent's clothes.
Also, when moving from Orgasmic Palace 3F to Orgasmic Palace 4F via the main stairs, you are always placed on the leftmost stairs. Going from 4F to 3F, however, and for every other set of 3 wide stairs, going up OR down, you keep your position, left to right. Only mention it because it deviates from the behavior of every other set of stairs, so its probably a bug.
Also Also, after the Empress leaves, the box in her office that held the Whip is open. This is a nice touch, I really appreciate the small stuff. It also makes it so you cannot interact with the box any longer. But when you stand below that table and press use while facing UP, it somehow accesses the wine on the other section of table. Probably via the same method that lets you talk to NPC's across tables, you are "Talking" to the wine.
...Boy, I'm finding some SMALL stuff. Am I nit picking? Is finding this shit even helpful?