This is what was added to the Test Server last night. Please continue to report any issues you may find on the Test server.
- Vehicles should no longer sink into ramps,stairs and deck expansions
- Fixed invisible zombies after being hit by cars on headshot-only servers.
- Fixed interaction problems with BBQs and furnaces.
- Fixed a bug with the direction of some melee particle effects.
Client Version: 0.78.1.55903, Steam Build ID: 706522
Source