BUG with antialiasing of two near figures

Hi,
Please consider two black squares (picture attached, just a simple illustration of a problem).
Squares are precisely aligned to be side-by-side.
And as you can see, there is an artifact between squares. Artifact was generated by Illustrator`s antialiasing, because if you press
Ctrl+K (Preferences) and switch off antialiasing, gray line disappears.
Possible workarounds:
W1) Totally switch off antialiasing (AA). BAD: lines becomes ugly.
W2) Place on that objects raster effect with AA off. BAD: rasterising by it self is bad; filesize x2; jagged edges.
W3) Slightly shift edge of one square towards other square. BAD: hard to do if geometry is much more compleх.
W4) Approximate needed with mesh objects. BAD: two side-by-side meshes have the same bug.
My questions:
Q1) Is there any other workarounds? Hotfixes?
Q2) Is there any sense to submit this bugreport to Adobe? And how can I submit it?
Q3) Is there some kind of technical support (forum, email etc) where I can also ask?
Illustrator versions with described bug: CS3, CS5.
And I guess all other versions.

Hi,
Have you tried using "Align to Pixel Grid" option in the transform panel ? On selecting the black squares and turning this option ,it works. It aligns the square edges to pixel grids and there by removes anti-aliasing effect.
Hope this would help.
Thanks,
Kals.

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