karnak1: I don't mean the keys to another house. I mean that before (whenever I spawned a new character) my character always had his keys (so that I could always lock the door whenever I left to scavenge).
Now I can't even lock the house where I start the game.
Lin545: Yes, this is what I meant - keys from your own house. But, wait... you can lock the door?!... What for? Multiplayer?
Hmmm... I thought that zombies were able to open doors. I didn't know they couldn't . Strange, since they can climb through windows.
I always thought that locking doors was exactly to prevent zombies from entering the house.
Thanks for the explanation :)
Anyway, in the old versions, whenever I started a new game my character would always have his own keys. That's why I suspected it was a bug.