I'm missing a simple and direct shortcut to deselect all selected files. I could do Ctrl-A & Ctrl-I, but that means that in a view with thousands of files but only a dozen selected, I would first select all the thousands of files just to the invert the selection to deselct them.
Any other application I know of which has a selection option also has a direct keyboard shortcut to "deselect all" or "select none".
Not a big deal, but sometimes annoying ...