Thanks for speaking up, but we do have a bug that's proving very hard to replicate. (In our logs we can see the effects on a very small number of daily users, so we're sure it's not user error.) Since you're not seeing trouble, would you mind helping us rule some things out? I see you're only using one Pinterest account and no other add-ons. Can you please tell us if you're using Container Tabs?

Thanks very much for your kind support.