There have two major bugs been reported:
1. Game crashed on tank explosion.
This has been fixed in the recent patch. Steam client should automatically update your game the next time you login Steam.
2. The "no sounds", "no camera follow", "no zoom", "no launch/impact visuals" problem.
This problem is a result of outdated videocard drivers. Please, if you have any of these issues, update your videocard drivers to the most recent version.