Has anyone done an upgrade from RHEL3 to RHEL4? Is this likely to break a lot of things? How long will Centos be supporting version 3? I just installed Centos 3.4 two weeks ago! The only problem I'm having with Centos is that the perl is a bit old. I have errors with spamassassin. So far bugzilla for spamassasin is blaming it on the version of perl included in RHEL3 and bugs in the 'taint' code. I see that RHEL4 has newer Perl packages.