I don't know. I do know over 200 bugs, many very big, have been fixed since Skyrim shipped. 1.6 isn't the last Skyrim patch, too. There's at least 4 more planned, I heard along the graqevine.
Source for the at least 4 more patches? Also, the PS3 still lacks the latest patch and the official word from Gstaff is there's no information about it as of now.
Also, 200 bugs might have been fixed, but there's still a veritable legion of bugs in the game. Many of these have been fixed on the PC with the unoffical patch, but why should that be necessary? Why should the consumer be responsible for fixing problems?
And if Bethesda isn't going to take the time to fix all the issues, why don't they just yank the unofficial patch and make it an official one? That way, players on all platforms get these bugs ironed out and there's more happiness all around.