Why is no-one counting the regeneration in The Stolen Earth / Journey's End? Did I miss something? Not that it matters much, of course, but should the show's creators opt to run with the limit of 12 regens starting with Hartnell, then they should really count it in.
If you ask me, the Doctor's aborted regeneration in The Stolen Earth/Journey's End disregarded the rules of regeneration more than this whole "507 regenerations" thing has.