Note: This is a duplicate. But The first, second and third tickets are not showing up.
Edit: Duplicate of: T129441 (now showing up)

First Crash:
Tryed to pick up ammonition (with the "F" key). Befor the Cahracter does the "take" annimation the game closed itself - no error message.
I restarted the game and was able to pick up the ammonition without a crash.

Seconde Crash.
I droped my Helmet and tried to pick up anaother Helmet (it was a screen Skater Helmet) but i wasnt able to (maybye anaother bug). So I decided to get my old Helmet (with "F" key). Now the Helmet was on my Head and after this the game crashes. But this time with some stuttering and not after the "F" press.
This crash was similar to this report: T129249.