I can visualize what you're going through... busy beta days have got you fully involved...

I just wanted to provide honest feedback that could help in any way with the issues/packages you people are working with.
I understand that final release build will have them ironed out; but beta is what I'm testing and reporting issues. (yes, it's selfish, if I report now, I'll enjoy a good release for the next 2 years.

Regarding the same issue, dunno if you're aware of, removing sharing using the tab and applying doesn't change back the previous default permissions of the shared folder.
Ignore if that's how it's supposed to work for the time being.