1. Create folder dir1 and inside it folder dir2
2. Double-click with the mouse on dir1 in tree pane
3. If on that stage dir1 is collapsed, click 'Enter' to expand it
4. Click 'Down Arrow' key to navigate to dir2 in tree pane
5. Click 'Enter' or Ctrl-o

Expected behaviour (as it was in Thunar 1.4): contents of directory dir2 should become displayed in the files pane and focus should shift to the files pane

Actual behaviour: nothing happens

Note: I actually use version 1.6.2, but currently 'Version' field doesn't have this tag