Demo stops working when entering the mine

[Thib_G]

I did try 3 times from beginning, it hanged 3 times...
The last time, I did a backtrace with gdb, but due to the lack of symbols, there is only information about mutex.
I'll now try again, by continuing the game, 3 times, and then delete ~/.frictionalgames and try again from beginning.

Edit:
So, I've tried :
1°) 3 times with my "old" conf and from the beginning, it didn't worked at all
2°) 3 times with my "old" conf and from the second lvl, it didn't worked at all
3°) 2 times from the beginning with the default options, it worked fine
4°) 2 times with high video settings, it worked fine