@Dmitriy: as I said, I have an up-to-date 12.10 and I still have a related problem (no empty icon, but a duplicate icon) when opening Writer files from Nautilus.
@Dmitriy: as I said, I have an up-to-date 12.10 and I still have a related problem (no empty icon, but a duplicate icon) when opening Writer files from Nautilus.