Just FYI and heads up, it seems as if the VMware RHEL Repo RPM's may be packaged incorrectly at the moment. For example, the repo referenced to by the RPM at http://packages.vmware.com/tools/esx/latest/repos/vmware-tools-repo-RHEL6-9.0.1-2.x86_64.rpm should reference to the repo at http://packages.vmware.com/tools/esx/latest/rhel6/x86_64. However it 'seemingly' incorrectly references to http://packages.vmware.com/tools/esx/5.1/rhel6/x86_64. I'm not sure if this is accidental, but it seems the same RPM has been placed in 5.1, 5.1latest, and the latest repo. I believe these RPM's should all make reference to their respective repos, 5.1 -> 5.1, 5.1latest -> 5.1latest, and so on.
For the time being, I am using this line to correct the situation.
cat /etc/yum.repos.d/vmware-osps.repo | grep latest || sed -i 's/5.1/5.1latest/g' /etc/yum.repos.d/vmware-osps.repo