@crinrictNo. Completely new one. In this one, upstairs hallway including place where stairs land is supposedly accessible to Sims, you can click and get option of "go here" with footprints, but the Sims cannot use the stairs. So, Sims stand at base of stairs waving their arms with a "can't go there" thought bubble. If I put floor where it should be open to below, Sims can get up and down stairs, but the house plan is ugly. Oh, and if they're upstairs, and the open to below areas are, well, open as they should be, they stand at head of stairs waving their arms with a "can't go there" thought bubble. Equally a problem upstairs as well.
The other issue was minor compared to this. At least I found workarounds for that, weird as it was that some parts of floor were inaccessible and had to change floor plan or roof to correct.
This one is affecting so many of my builds, I've warned people not to download my houses if they have the Nov. 10 patch because the stairs won't work.
Edited to add: I have used (multiple) workarounds to get my houses working with 11/10 patch, for the most part. So, most of them are fine now. But, man, was it a pain. The simple workaround is only half the battle because after that ceilings and rooms have to be adjusted to get the game to look and behave as though they're indoors again. And sometimes, even that isn't enough - I'm looking at you Chez Llama! To be fair, Chez Llama is indoors per the game except for some weird lighting issues.
