Game crashes when map changes

[Usain_Bolt]

After updating NI to 0.6 my game started crashing when map changes or when i try to join a server. I would say i have about 50 % chances of crash every time. It's not map dependant as sometimes i crash when loading new map, but after restarting the game i can join exactly the same server on the same map.

What did i do so far:
1. Updated graphic drivers
2. Changed game settings in many ways back and forth
3. Installed hotfix for 0.6
4. Reinstalled NI and installed hotfix
5. Reinstalled whole M&B, NI and installed hotfix
6. Deleted all game data, reinstalled everything again + hotfix.

I have never experienced this problem in M&B before, neither in Vanilla, NW, Full Invasion, cRPG or PW.
Any ideas?