1. Start attached buggedbuildings_repro.Altis mission with 2 players in non-dedicated environment (works in dedicated too)
2. Player 2 (Client) approaches offices build ahead and plants 1 explosive right near the edge of it.
3. Player 2 (Client) gets back a little and blow explosive up causing first edge of the building get destroyed and then entire building go down. If building didn't get destroyed or Player 1 didn't see edge of it destroyed then you should restart the repro.
4. From now on any non-host players walking inside the building will get thrown up in the air to their death. Should affect vehicles too.
5. Sometimes player ragdolls get stuck in the ruins and cause terrible FPS drops which is observable in the video. Happens randomly so keep dying until FPS drop occurs.
Video: http://youtu.be/hvM8vLenhW4
Additionally one player reported that he had left sound channel going mute during testing after building got blown up. We didn't manage to reproduce it but considering that we often hear such feedback about left channel going mute it might be connected to this bug somehow.