Confirmed.
I have a 1.04 Quick Save right after I went upstairs and found the whole floor hostile. After installing 1.05 and loading that save the first time, the floor is retro-actively "fixed" that they are no longer hostile. However, the statue still asks me to leave as if I've turned the floor hostile.
However, if ANY save occurs ANYWHERE, the Sanitarium will revert back to hostile. This means AUTO SAVE when you changes map (which is why people who went outside or down stairs will find the 1st floor Sanitarium becomes hostile again), QUICK SAVE, and NORMAL SAVE.
This is means you will no longer be able to return to Sanitarium for other quests since if you leave, the game auto saves and the Sanitarium will become hostile when you return.
So yea, the Sanitarium is still bugged. And if I want to keep a non-hostile save for future patch testing, I can't use QUICK SAVE from now on since that is the only save file where the Sanitarium is non-hostile. (And obvious if I leave the Sanitarium to progress further into the game, it will become hostile since the game AUTO SAVES everywhere.)