[CentOS-mirror] Yum 3.2.8-9 from msync-dvd.centos.org wrong?

Mon Jul 21 23:21:33 UTC 2008
H. Peter Anvin <hpa at zytor.com>

Johnny Hughes wrote:
> Yes, I went through and manually hard linked all the noarch files, as 
> you were correct that some had different md5sums even though they were 
> hard linked.

How could files have different md5sums if they are hard-linked?