Loading customizations in `db/run-init' may cause accidental overwrites of
custom settings when loading variables changes and saves values of other
customizable variables. For example, loading `custom-enabled-themes' may update
`custom-safe-themes', and if this loading happens after initialization time,
this update is directly written to custom.el via a call to
`customize-push-and-save', overwriting all remaining, i.e. not loaded, custom
settings. Loading custom settings during initialzation time prevents this
behavior.
Note that this change causes some packages to load during initialization time
that previously had been loaded only afterwards.
Daniel -