rhel 6 x86-64 rpms no longer install

The problem seems to be that the checksums in
http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/repodata/repomd.xml
don't match the names of the other files in
http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/repodata/

I note that the timestamps in that directory are all quite recent. Would
be very grateful if you could take a look

[vagrant(at)puppet ~]$ sudo rpm -ivh
http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/pgdg-centos94-9.4-1.noarch.rpm
Retrieving
http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/pgdg-centos94-9.4-1.noarch.rpm
Preparing... ###########################################
[100%]
1:pgdg-centos94 ###########################################
[100%]
[vagrant(at)puppet ~]$ sudo yum update
Loaded plugins: versionlock
Setting up Update Process
http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/repodata/a8d8f2396384cb48cef7d265d74b4366541f803da921c3aa98f8df5c0a4c3bf5-primary.sqlite.bz2:
[Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not
Found"
Trying other mirror.
Error: failure:
repodata/a8d8f2396384cb48cef7d265d74b4366541f803da921c3aa98f8df5c0a4c3bf5-primary.sqlite.bz2
from pgdg94: [Errno 256] No more mirrors to try.

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dan(at)telent(dot)net
http://ww.telent.net