Please kindly help me with a problem. I'm now following the Perfect Server guide for Centos 6.2 with Apache. Now I'm stuck on page 4: http://www.howtoforge.com/perfect-server-centos-6.2-x86_64-with-apache2-ispconfig-3-p4 The problem is - I can't build courier's rpm: sudo rpmbuild -ta courier-authlib-0.63.0.tar.bz2 I get (after some processing) this error: Segmentation fault and then shortly afterwards the process stops with: Bad exit status from ... SeLinux is disabled, and otherwise the setup is followed strictly (except for the partitioning scheme, because I use software raid 1) I don't know if it's pertinent, but I see the following messages during the boot-time, while loading udev Failed to enable MSI-X and also: ACPI: I/O resource 0000:00:1f.3 [0xf040-0xf05f] conflicts with ACPI region SMBI [0xf040-0xf04f] but udev starts with a green OK nonetheless but later it says something like "catching up udev unfinished tasks" - and it also gives a green OK. So, I wonder, 1. What could be the possible reason of my failing to rpmbuild courier-authlib? 2. Are the boot-time messages I've described above critical for a production system?