Symptom: Amanda-client was not able to back up using dump, when installed from the binary. Rebuilding from SRPM made it work. Cause: Amanda binaries have the paths to dump and restore hardwired into them (why???). These are determined during configure. This is an old bug/feature of amanda (see docs/FAQ). I suppose the RH build host did not have the dump package installed. Amanda builds merrily w/o dump support - gnutar is still fine. Quick fix: Build rpms on host with the dump package installed.
Fixed in powertools-5.2.1 amanda-2.4.1-2. Thanks.