(gdb) bt
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7787dae in __lll_mutex_lock_wait ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb7783aac in _L_mutex_lock_51 () from /lib/tls/i686/cmov/libpthread.so.0
#3  0xb778349d in pthread_mutex_lock () from /lib/tls/i686/cmov/libpthread.so.0
#4  0xb7be7a2c in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#5  0x0804d298 in ?? ()
#6  0xb73b3afc in ?? () from /usr/lib/gtk-2.0/modules/libgail.so
#7  0xbfd7baf8 in ?? ()
#8  0xb73a6d50 in ?? () from /usr/lib/gtk-2.0/modules/libgail.so
#9  0xb73a6d39 in ?? () from /usr/lib/gtk-2.0/modules/libgail.so
#10 0xb741dce0 in ?? () from /usr/lib/gtk-2.0/modules/libatk-bridge.so
#11 0xbfd7bb08 in ?? ()
#12 0xb7bc852b in atk_misc_threads_enter () from /usr/lib/libatk-1.0.so.0
Backtrace stopped: previous frame inner to this frame (corrupt stack?)