This has happened to me as well - pretty annoying. I've been killed one time (ergo, confirmed other players can see me) but the same thing happened on next spawn... Also, zombies aggro to my position but they just stand around where I think my character is. Is there anything we can do or do we consider the cd key as lost? I've seen others asking for character restarts but I guess the dev team guys are overloaded enough as it is... EDIT: Ok, so I've tried a private hive server and everything works fine there.