For those who've lost characters mysteriously, apparently there is a timeout bug which the server will hold your (aggressive zombie attracting) avatar present on the server up to 15mins after you've quit.
Also a similar one involving the 15mins of lag where you are playing on a server, yet an avatar of you (exact replica) is glued to the spot somewhere you've been. This can be attacked and you will die, despite being elsewhere on the map. When this happens, you will be unable to interact with anything on the server. If your avatar is untouched, the game should kick you, or remove the other avatar (if the lag stops).
Otherwise, you're dead.
Also a similar one involving the 15mins of lag where you are playing on a server, yet an avatar of you (exact replica) is glued to the spot somewhere you've been. This can be attacked and you will die, despite being elsewhere on the map. When this happens, you will be unable to interact with anything on the server. If your avatar is untouched, the game should kick you, or remove the other avatar (if the lag stops).
Otherwise, you're dead.