Demo stops working when entering the mine

[Urkle]

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.

If you send me the backtrace from GDB I can look up the symbols on my end to debug.