and you already saw my output from "tar tvf b.tar", so you already know
that this is probably due to not understanding extended headers.
My other ppc64 box (running Fedora core 3.92) has no problems, so this is
apparently something that has been changed between tar 1.13.25 and 1.15.1
(YDL 4.0 vs Fedora Core tar versions).
Linus