Looks like Sigma will have to deal with AF reports first and check this before release of the 85mm f/1.4 Art. This is not good advertisement for Sigma and their products.
My 50mm f/1.4 Art does not have AF problems. I am extremely happy with my copy.
no one has problems with AF of this lens except the one that has a 1D series, like me
Yeah, I've found that the focus on the 5D3 is really excellent with the new sigma, but unfortunately pretty bad with the 1D3 and 1Ds3.