[IanJRedman]

The title sequence has been substantially altered. The last third or so (beginning just after the actors' names, as the TARDIS bursts through the cloud) looks brand new. The form-up of the logo is vastly improved - it looks like a proper 3D modelled element this time, rather than a PNG from Google. Lends some credence to the theories that the version seen on the previous four episodes was rushed and unfinished...