[CentOS] YUM - Did directories change on the mirrors?

I didn't see this in the mail archives, maybe I missed it.   I'm running 
CentOS 3.  It looks like the $releasever directory has been dropped from 
mirrors.centos.org.  This just happened in the last week (I run a daily 
cron to check for updates)    My yum.conf (for CentOS 3) has url's 
defined like:

    baseurl=http://mirror.centos.org/centos-3/$releasever/addons/$basearch/

But when I run yum I get errors:
   Server: CentOS-3 - Addons
   retrygrab() failed for:
     http://mirror.centos.org/centos-3/3/addons/i386/headers/header.info
     Executing failover method
   failover: out of servers to try
   Error getting file 
http://mirror.centos.org/centos-3/3/addons/i386/headers/header.info

Using my browser I see that this URL doesn't exist:
   http://mirror.centos.org/centos-3/3/addons/i386/headers/header.info

But this does (notice the 3/ is missing):
    http://mirror.centos.org/centos-3/addons/i386/headers/header.info

Is this a permament change or a temporary one due to server updates?

Thanks,

-Gerry

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