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hmm.. that backtrace is quite short compared to what I'm usually seeing

Can you please also try the gdb command "thread apply all bt full"?
(gdb) thread apply all bt full

Thread 16 (Thread 0x9cf3db70 (LWP 9667)):
#0 0xb7fe1424 in __kernel_vsyscall ()
No symbol table info available.
#1 ...

An actual stack trace from the segfault might also be useful
(search the internet for "gdb stacktrace")

libpng warning: iCCP: cHRM chunk does not match sRGB
libpng warning: iCCP: known incorrect sRGB profile
libpng warning: iCCP: cHRM chunk does not match sRGB
libpng warning: iCCP: known ...

You ommited a critical bit of information:
video card driver (+it's version, if appropriate)
video card memory size

So far it seems that you are way luckier than some of us who own Intel cards.
We can play without crashing for minues... but... well... kinda without most of the graphics.


cat ...

Problem:
1. Start game -> Load save game -> play (5-15 seconds) --> Game crashes
2. Start game -> New game -> play (5-15 seconds) --> Game crashes

The game crashes only when I start to move.

OS: 3.2.0-4-686-pae #1 SMP Debian 3.2.51-1 i686 GNU/Linux
Game version: 0.9.1
cat /proc/meminfo ...