Comment # 7 on bug 1131761 from Dominique Leuenberger

(In reply to Suse User from comment #4)
> I think this is incorrect behavior. This is the first time I see something
> like this.

Seen other cases - definitively not the first

> Correct ownership and permissions must not depend on root's umask. Would you
> agree?

This is debatable - if you have your user configured for a special umask,
programs started as that user should respect it (and rpm installation IS
started as root). It's always a fine line between breaking what should work and
following user configurations.

in case of glib-compile-schema, it's probably best to ignore user configuration
though and set hardcode mode 644