You can check on your own device now by going to SW_update in the application menu, but you should see/experience the screens below:
It's not known if there are additional changes other than for Twitter authentication, but I'd bet on a few bugs fixes under the hood too. Comments welcome if you notice anything!
Somewhat annoyingly, the update requires a device restart, but then I guess there are hooks into homescreen widgets and Gallery, so.....
The OAuth re-authentication went smoothly on the editorial devices, with just this one permissions screen.
Full up and working using Symbian's built-in (Social) Twitter client again.
Great to see Nokia and Accenture still on top of Symbian to this degree. Anyone know how long Twitter (initial) authentication has been 'broken' for?