RI and restoring dumps

Has anyone experienced referential integrity (RI) problems while restoring
data from a dump?  Like, if the dump doesn't restore the data in the right
order, then primary keys might not be in place before the foreign keys are
restored.  I want to know this from people who have experience before I do
use RI!

Actually I did use RI in a database but had complications with it (I forget
exactly what it was, something like the order of PL/SQL procedures and RI
triggers firing caused some problems) but removed them all and just tried
implementing all the checks I wanted in my PL/SQL triggers myself.

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