I also had that issue (which is why i upgraded originally). That is fixed by running the following...
yum remove lvm2
yum remove lvm2-libs
Then I grabbed the lvm2 rpms for version 2.02.87
rpm -ivh lvm2-libs-2.02.87-6.el6.x86_64.rpm
rpm -ivh lvm2-2.02.87-6.el6.x86_64.rpm
It works fine after that, and when done just run yum update lvm2 to go back to the latest lvm2. Found this solution after looking all over the web.