Usually, on an issue like the following, I would just edit the exr in photoshop to get rid of those random artifacts, but for this I cannot.
Screenshot is here
[30393-2014-08-04+09_26_17-unity.jpg|30393]
as you can see, I do not have AO enabled, this is a screen taken directly from the editor, so no post effects are in play.
I don’t think that it is because of low texel density - since it looks like that AO effect is bleeding onto texels that should not be receiving any of that cast shadow from the pillar - although the texels are weirdly squashed, so that needs to get fixed.