I've found (through an accidental hard delete) a flaw in the way the DMX UI operates. I'll try to keep the scenario simple. In the root directory, suppose we have a folder named "Folder".  Inside that, we have a folder named "Subfolder". In the default AJAX view, I can click "Folder" on the left-hand pane to display the conents of it in the right-hand pane.

I found that if I click "Subfolder" in the RIGHT-hand pane (to select it), the same folder is not selected in the left-hand pane.  In the left-hand pane, "Folder" is still highlighted.  This means that "Folder" is selected on the left, while "Subfolder" is selected on the right. 

It might seem like a trivial behavior, but it's quite major.  When the user then used the menu to select "Folder>Hard Delete", it won't delete the folder selected on the right.  It deletes the parent folder on the left. I destroyed an entire parent folder of data because of this (and the "graveyard" feature doesn't seem to be enabled on our custom build of 5.1.0).

Can this behavior be fixed so that clicking a folder on the right pane also selects the same folder in the left pane?