I have an alt, not part of my deed, not part of any deed; befriended and in "Trusted" category.
The alt is added - with full permissions - to buildings on my deed; deed settings for non-citizens role are set to don't allow anything.
Tonight, my alt (trusted friend, added to a building with full permissions, including "Manage") was unable to pick anything from any building on deed, despite the specific permissions on each building.
I tried both in buildings with arched walls and with (locked) doors, in buildings owned by myself or "deed managed'".
Alt was able to drop things she had in inventory and pick them up again from house floor (she didn't log out), to manage the buildings, but not to take anything already in there, on the ground (no bulk containers).