This is from my freind at Sony about the new firmware update that my tv did this morning:
Hi Steve, this update is what we call internally as an unlisted specification update. Often times Sony will release updates which only effect the internal workings of the TV. In these cases the actual details regarding the update will not be released because the customer will not see any effects of the changes. Sony usually only releases details about a release when it is a major change that the customer will see some effects from.
So I guess that answers the question I had. Scotts a great guy.