When building a server with an external kickstart (Opsware) server and installing puppet Foreman lists the Operatingsystem as RedHat 5.3 as the server build even though the server is 5.4 and clicking in "Inventory" you can see that facter reports 5.4

Name Operatingsystem
Linuxautolab-bg-a013d RedHat 5.3

operatingsystemrelease 5.4
lsbdistdescription Red Hat Enterprise Linux Server release 5.4 (Ti...
lsbdistrelease 5.4
lsbdistcodename Tikanga
operatingsystem RedHat
lsbmajdistrelease 5
lsbdistid RedHatEnterpriseServer