Trying to paste from Illustrator as smart object

Question

Is there a trick to pasting a pixel-perfect vector image from Illustrator into Photoshop as a smart object, and not introduce a bunch of anti-aliasing that was not in the original file? My images are perfectly aligned with the pixel grid in Illustrator, and the pixel preview shows them correctly.
This page is helpful for dealing with vector shape layers, but the techniques he talks about don't work for smart objects. Strangely, he says he doesn't have a problem with smart objects, but I do.
Here is an example of what I'm talking about: a simple 13x13 pixel image in Illustrator turns to crap in Photoshop when pasted as a smart object (I know an image as simple as this could be pasted as a shape layer, but the real images I'm working with are much more complex, and cannot be pasted as simple shape layers).
I'm using Photoshop CS4.

Answer 1

Good news, everyone! With the release of Photoshop CC 2014, this is STILL broken.
Starting with an Illustrator document that is 50x50 px:
Then create a 50x50 square, at x=0 and y=0:
Create a 30x30 square over top of that, inset it (x=10 and y=10):
Use Pathfinder to punch out the front:
Paste that into Photoshop as a smart object. 100%x100%, at exactly x=0 and y=0.
Expected behavior:
The first ten rows and the first ten columns of pixels should have a solid color.  The pixels in the 11th row or column should be 100% transparent, right? We punched a hole with precise coordinates, and have the Photoshop document matching the document size as well as accommodate exactly 100% of the object.
But instead, we get this:
Zooming in further, you can see the 11th pixel, whether looking at the rows or columns, has a slight bleed of the color and opaqueness from the pixel immediately above/left:
It is approximately 6% of the strength of the adjacent pixel that it is inheriting from. Interestingly, the effect can compound where a pixel is receiving color from BOTH the left AND the top.  Also interesting: the effect does not occur in reverse.  That is, opaque pixels do not "inherit"  ~6% transparency from the top/left adjacent pixels:
So, my question to Chris, if he's still employed by Adobe, if this is intended behavior, how can I accomplish transparencies with solid lines that do not bleed?  Like.. what is the workaround (that doesn't involve flattening or touching up with masks)?
-J