CentOS - Jul 2012 - FYI, minor change in anaconda behaviour between 6.2 and 6.3

If you use a kickstart file to build unattended servers (eg virt-install)
then new disks or virtual volumes will cause problems unless you have
"zerombr true" in the kickstart file
eg
  zerombr yes
  clearpart --all --initlabel
  part /boot --fstype=ext4 --asprimary --size=100
  part swap --asprimary --size=512
  part / --fstype=ext4 --asprimary --grow --size=1

(CentOS 6.2 didn't need zerombr).

Also FWIW, lines such as
  repo --name="CentOS"  --baseurl=http://repo/CentOS/DVD/CentOS-6
  repo --name="Updates"
--baseurl=http://repo/CentOS/updates/centos6/x86_64

now work.  In CentOS6.2 this would fail with dependency problems.
Whether that's just 'cos the updates repo doesn't have conflicting
packages so far and it'll break in the future, but it's working today
:-)

-- 

rgds
Stephen