[CentOS] Upgrade

Thomas Dukes wrote:
>  

> 
> The error I got when I ran 'yum update' was:
> 
> Error:  Missing Dependency: nss = 3.12.2.0-2-el5.centos is needed by package
> nss-devel

Yes, that will do it - devel packages do need to be the same EVR.
Sounds like you figured it out.