Puppet users - Mar 2013 - new puppet user with metadata problem

I''m getting this on a number of my systems, some rhel 5 and some rhel
6.
Some new and some old. Any thoughts? thanks

[root@x yum.repos.d]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5.8 (Tikanga)
[root@x yum.repos.d]# yum clean all
Loaded plugins: rhnplugin, security
Cleaning up Everything
[root@x yum.repos.d]# yum install puppet
Loaded plugins: rhnplugin, security
EPEL5-x86_64                                                               
                                                                            
                                                              | 1.2 kB     
00:00     
EPEL5-x86_64/primary                                                       
                                                                            
                                                              | 2.4 MB     
00:00     
EPEL5-x86_64                                                               
                                                                            
                                                                          
 7251/7251
controltier36-release                                                       
                                                                            
                                                             |  951 B     
00:00     
controltier36-release/primary                                               
                                                                            
                                                             | 2.4 kB     
00:00     
controltier36-release                                                       
                                                                            
                                                                            
    4/4
controltier36-updates                                                       
                                                                            
                                                             |  951 B     
00:00     
controltier36-updates/primary                                               
                                                                            
                                                             |  205 B     
00:00     
puppetlabs                                                                 
                                                                            
                                                              | 1.9 kB     
00:00     
puppetlabs/primary_db                                                       
                                                                            
                                                             |  75 kB     
00:00     
http://yum.puppetlabs.com/el/5Server/products/x86_64/repodata/primary.sqlite.bz2:
[Errno -1] Metadata file does not match checksum
Trying other mirror.
puppetlabs/primary_db                                                       
                                                                            
                                                             |  75 kB     
00:00     
http://yum.puppetlabs.com/el/5Server/products/x86_64/repodata/primary.sqlite.bz2:
[Errno -1] Metadata file does not match checksum
Trying other mirror.
Error: failure: repodata/primary.sqlite.bz2 from puppetlabs: [Errno 256] No 
more mirrors to try.
[root@x yum.repos.d]# 

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