gconftool-2 failing in rpm scriptlets?

[Michael Schwendt]

Under which circumstances might a GConf2 post-install scriptlet like
this fail to create application's default settings unreproducibly?

export GCONF_CONFIG_SOURCE="$(gconftool-2 --get-default-source)"
gconftool-2 --makefile-install-rule /etc/gconf/schemas/celestia.schemas &>/dev/null || :

If after package installation, the application's GConf2 defaults
cannot be found in /etc/gconf/gconf.xml.defaults/, is that an
indication that the post-install scriptlet was not executed at all
(and e.g. Yum could be involved) or that only GConf2 failed somehow?

Theories, anyone?

-- 
Background:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=143318