The Celluloid package generates it's own icon cache at share/icons/hicolor/icon-theme.cache. When you install the Celluloid, I believe this overwrites the profile's icon-theme.cache, which causes none of the other icons to show up in launchers that use this, for example gnome shell's application launcher.
Perhaps also it is an issue that the profile's generated files do not have priority over all the files within all the packages installed to the profile, i.e. none of the packages should be able to overwrite the files generated with the profile hooks.
