Hi Michael,
We don't have that floating "info box" any more. Resources now open in a modal so you can easily review metadata without losing your place in the results. This was deemed to supersede the hover box.
Why 10.0? We're always improving security and functionality, and I would always strongly advise running the very latest version in production, currently 10.7 (and within ~3 weeks, 11.0). Upgrading is designed to be as painless as possible meaning there should be no reason not to.
Dan