When hiding the Resources tool via Site Info this change would set the root folder of the site to "Hidden but with Accessible Content", special hidden.
When hiding the tool -> set root to special hidden. When Unhiding the tool, set to Visible. There is discussion from this on the sakai-user list.
This is controlled by setting the sakai.property poh.resources.hidden.special.hidden to true.
As a result of this ticket changes where made to the elFinder to now drop you into the root of a site (no matter what), that is not into the Resources folder as previously. Also, changes where made to the "Add attachment" part (in Assignments / Forums) to respect this new setting.