Not sure if it's your theme or something else you have loading. The plugin is compatible with Chrome, so there is something in the setup as you have it that is incompatible.
If you want to track it down, you could go about it a couple of ways: start by deactivating plugins one by one and testing. Or you could go the opposite way - deactivate plugins and bring them up one by one. You might also start by testing with your current plugins activated, but trying the default theme to see if there's something in the theme that is causing it.