dope25

What files did you replace? Mod files, or game files? Edit: After completely deleting every Arma / OA version I had on and installing fresh and downloading the new version, zombies started appearing.

It appears that if you can't see zombies then you can't see all kinds of objects scattered around (barricades, certain car wrecks, trash on the road). I can't, at least.

Are you able to see animals? I can't see neither zombies nor animals. EDIT: Nevermind, it's really hard to find them. It could be because I had another player with me.