RedHat 6.2 installed boot image tries to disable the CPUID serial number which causes Athlon Thunderbird on a motherboard with KT133 chipset to get a general protection fault. This can be fixed by not disabling the CPUID serial number. Test system: 800MHz Athlon Thunderbird FIC AZ11
Bug #16229 has the workaround. Fixed in the current errata kernel. *** This bug has been marked as a duplicate of 16229 ***