It keeps happening every few minute to about one third of all players, started to happen on todays wipe, any ideas what that could be? please help me.

disconnecting: Exception (cs:57814): NullReferenceException: Object reference not set to an instance of an object. BasePlayer.VisUpdate () (at <00000000000000000000000000000000>:0) BasePlayer.UpdatePlayerVisibilities () (at <00000000000000000000000000000000>:0) BasePlayer.ClientCycle (System.Single deltaTime) (at <00000000000000000000000000000000>:0) Client.Update () (at <00000000000000000000000000000000>:0)

There are a few existing threads on this, which I would suggest taking a look at.

i checked but it didnt help, what do i do now?