AfterSave callback but only when the record is new

I want to trigger a callback after the creation of an object. With a
after_create I have the problem that if the record crash for any
reason when save, then I have some corrupt data. So I need a callback
after_save but only when the record is new.

As far as I know after_create *is* after_save but only when the record
is new. What is the problem that you have using after_create?

Colin