Well, I was going to make a "Oh look, TLG is replacing some part molds or something, amirite?!" thread about this, but evidently TechnicBRICKS beat me to the punch by quite a while ago:

http://technicbricks.blogspot.com/2011/12/thin-triangle-liftarm-redesigned.html

So, share what sets you've put together recently where the parts that were supplied are new versions of the element shown in the instructions!

For me; the Extreme Cruiser I got about two and half weeks ago had replaced the 16t gears with a newer, more-heavily reinforced version of said gears. The Quad Bike I put together today made the same change and also replaced the older Technic thing triangles with the new, smaller ones, like the ones shown in the picture above. I expect my 8070 Supercar to have much of the same changes.

I expect all 2012 sets to have the new molds; at least the 9390, 9396 and 9397 have them. Also, the 8070 I built, which was manufactured late last year, has the new molds.

I bought 8043 in April this year and it has new technic triangle, new LAs and new 16t gears