When adding hardlinks to an archive, tarfile does not set the size of each additional link to zero as specified by the tar format [1]. In addition, the current test case hardlinks is also broken. Instead of testing that the size of a hardlink to a non-empty file is 0, it tests that the size to a empty file is zero, which cannot fail. A patch against current svn trunk is attached and was tested with 'python -m test.regrtest -v test_tarfile' 1. http://www.gnu.org/software/tar/manual/tar.html#SEC170
