Please, stick GCONF_DEBUG="no" above the inherit line to prevent this flag leaking in from gnome2.eclass. Thanks.
I always wondered about that one. And this is the time to fix it, now 9.21 has just been unmasked. I hesitate to fix this in 9.20 as well because it would cause a bogus reinstall on an `emerge --newuse`. :) Fixed in opera-9.21, then.