I'm having a problem on a client website, which seems to also occur in a fresh install of Magento. I've set up a custom role "test", and I tick OAuth Authorized Tokens, and hit save. When I go back to the page, it doesn't stay ticked. It seems to save the value in admin_rule, but it's not reflected in the checkbox on returning to the page.
The issue arose due to some custom code having the same issue. The developer had added a capital letter into the XML node name for ACL in their system.xml. Once changed and re-set, these then remained ticked.
Sure enough, I've found that if I change Magento's XML node to authorizedtokens instead of authorizedTokens, it saves and restores the setting correctly.
Is this a bug? It's an annoying one, as I'm not sure the client is actually likely to usee this feature, but they've pointed it out. Seems daft to have to rewrite a couple of classes and update the ACL XML node to get this to work.