Originally Posted by Micro420
I don't know what the %post script actually does.
Query the (installed) RPM for the shellscripts it runs and output to file. Remove any script code for other sections like %pre or %preun. Now running the code as 'bash -vx filename 2>&1|tee result.log' will show all commands executed and their output for you to post here.
* BTW, I don't know what your signature line "CentOS 5.3 delayed because someone got married" tries to convey, but Centos only is an actively maintained distribution because of those volunteers. If this is criticism of sorts I think it's rather inappropriate.