As implemented in namcap, namcap now checks for the cache updating in /usr/share/icons/hicolor. I would like to extend this policy to /usr/share/icons/gnome also for 2.28. At this moment only gnome-icon-theme should be affected, but I don't know if there's other icon themes or applications installing icons there. # find /usr/share/icons/hicolor/ -type f | wc -l 616 # find /usr/share/icons/gnome/ -type f | wc -l 3002 Makes sense to cache gnome also then. There's some other themes extending the gnome theme, hicolor is default always, so caching this will make gnome applications a lot faster when doing icon lookup.