There's one more coreutils sha384 failure on s390: http://buildd.debian.org/fetch.php?&pkg=coreutils&ver=5.97-3&arch=s390&stamp=1155033735&file=log&as=rawISTR that s390 handles 64 bit badly (is that right?), in which case sha384 & sha512 will be non-starters on that arch (also right?). One possibility is to just disable those two algorithms on that arch.
Mike Stone