Nautilus (gnome-files) When clicking the down-arrow icon upper right side in window, and then trying to click on one of the two enabled menu items (Visible Columns and Reload) nothing happens, the menu closes. Also, when the down-arrow icon is clicked a pop-up menu item appears on the top left of the window with the grayed out undo/redo menu items. It looks like a tool tip style menu pop-up, not a regular menu drop.
Work-around is to use terminal and the gsettings command to set visible columns. This is fully functional and does change the visible columns.
You have the tech specs of my hardware. Here is the dmesg.