Yes, and I've also seen this clip
http://youtu.be/vhIPzJAwCPs
At 00:12 of the above clip, Simmons holds Weepu back to create space for Beale’s incision which leads to Ioane’s try.
At 00.45, a ruck has clearly formed but Horwill "steals" the ball. Once a ruck is formed ("where one or more players from each team, who are on their feet, in physical contact, close around the ball on the ground"), a new off-side line is established and the tackler has no rights and must re-enter through the gate. So it could be argued that Joubert really blows it it should have been penalty NZs, with Carter booting an inevitable 3 pts and not 7pts to Wallabies.
Frankly, if that was McCaw, undoubtedly there would be a video promoted by Gagger to highlight the bastard "cheat" and all refs' blindness to it, and this forum would debate McCaw's cloak of invisibility, and Paddy O'Brien's role in intimidating Jobert and other ref.
Personally, I'd like to applaud Horwill for getting away with one and understanding that Joubert's breakdown interpretations seemed a little more sympathetic to the defending team and taking advantage of it. Similarly, Simmons may have recognized Joubert's blind spot for his type of infringement (as evidenced by Weepu's hold on Cooper) and any effort to label him as a cheat should be strongly discouraged..