Confirmed all fixed :)

Objects are still falling over. They dont fall over for any vehicles anymore but whilst on foot they still do.

Im also experiencing this in the latest patch (25/05/2013)

I have manually added walls/objects/lampposts and when ever another player joins local or dedicated host all objects would fall.

Can no longer recreate this issue :)

Hacking AI, They shoot us from 300+ meters within a few shots, if not the first...They spin around and shoot at us if we sneak up to them... Not only that, When they go prone at 300+ meters they disappear into the ground making them invisible