Just installed LO4.0.1 from http://www.libreoffice.org/download as before, and can report that the icons which appear in the Unity launcher and the Application Switcher are much improved. Not perfect, though - successive programs of whatever filetype are marked as being of the same type as the first file to be opened, but it seems functional. A bonus: my custom 'address book' icon for my addresses spreadsheet now works for the first time in a year or so.
A footnote to my comment #36 above:
Just installed LO4.0.1 from http:// www.libreoffice .org/download as before, and can report that the icons which appear in the Unity launcher and the Application Switcher are much improved. Not perfect, though - successive programs of whatever filetype are marked as being of the same type as the first file to be opened, but it seems functional. A bonus: my custom 'address book' icon for my addresses spreadsheet now works for the first time in a year or so.