Any Way to Get Anti-aliased Depth Maps?

aaráribel caađo

I prefer to work with 32-bit files, and always generate a beauty, depth and alpha pass. However, the depth passes are mostly worthless since they aren't anti-aliased. 

When, as is the case in this screenshot, hair or other complex suface is far away from the background, the edges create horrible noise that essentially ruins the image if you use it in post. Is there any way to get proper depth maps out of DS's Iray implementation?