I and several of my friends have experienced this problem in the multi story building that can spawn guns on in a single room on the top floor. Zombies on the ground floor can attack a player on either the 1st or second story of the building.

Hi,

This has been reported previously - remember to search before opening new issues.

Closing as duplicate of #0000630: Zombies hitting through floors

Please vote up the original issue to increase visibility, add any extra information in the notes section, and monitor it for further developments.

Thanks