Have you had any issues with OGP and the Ignite theme? I routinely share post links on social media sites, and since adopting Ignite, LinkedIn doesn't render my links. Facebook displays previews properly, so it isn't a global issue (I had a past plugin--ContentShare, I think--that conflicted and removed OGP tags, but I pulled that before Ignite). I just really need to have my links preview properly in LinkedIn shares.
Requirements from LinkedIn: http://help.linkedin.com/app/answers/detail/a_id/46687/ft/eng