Comment 8 for bug 1448407

I tried a few things:

reinstalled libreoffice-common (which contains the icons).

Nothing changed

I changed an icon manually and it worked (changed to hicolor icons, 48x48).

Nothing changed

dconf-editor: claims desktop icon set is ubuntu-mono-dark (which has no libreoffice icons).

No entry for nautilus.

Thus the question: How does Unity get its icons?

The desktop file states (e.g. /usr/share/applications/libreoffice-writer.desktop):
...
Icon=libreoffice-writer
...

and on the machine I can find:

./app-install/icons/libreoffice-writer.svg
./icons/gnome/16x16/apps/libreoffice-writer.png
./icons/gnome/32x32/apps/libreoffice-writer.png
./icons/gnome/48x48/apps/libreoffice-writer.png
./icons/gnome/128x128/apps/libreoffice-writer.png
./icons/gnome/scalable/apps/libreoffice-writer.svg
./icons/gnome/256x256/apps/libreoffice-writer.png
./icons/hicolor/16x16/apps/libreoffice-writer.png
./icons/hicolor/32x32/apps/libreoffice-writer.xpm
./icons/hicolor/32x32/apps/libreoffice-writer.png
./icons/hicolor/48x48/apps/libreoffice-writer.png
./icons/hicolor/128x128/apps/libreoffice-writer.png
./icons/hicolor/scalable/apps/libreoffice-writer.svg
./icons/hicolor/256x256/apps/libreoffice-writer.png
./icons/HighContrast/16x16/apps/libreoffice-writer.png
./icons/HighContrast/32x32/apps/libreoffice-writer.png
./icons/HighContrast/48x48/apps/libreoffice-writer.png
./icons/HighContrast/22x22/apps/libreoffice-writer.png
./icons/HighContrast/256x256/apps/libreoffice-writer.png
./icons/HighContrast/24x24/apps/libreoffice-writer.png
./icons/locolor/16x16/apps/libreoffice-writer.png
./icons/locolor/32x32/apps/libreoffice-writer.png

Presuming Nautilus being a Gnome application, Nautilus searches for the icons in the gnome part first (maybe someone can answer this quickly before I have to dig into the sources).

So, as I am completely confused now, how can I help sort this out?