1. Berserker's guardbreak and push inflicts some damage (maybe this is not a bug but I didn't found any description of this feature).
2. Berserker inflicts damage in «No Damage» mode.
If you start a custom match (a duel for example), set damage parameter to «No damage», choose any bot(s), pick Berserker as your class (or create bot with a Berserker class) you will see that Berserker's attacks and guardbreaks cause very small damage.

