.
Thread 2 (process 5511):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb72a5823 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7380e03 in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x080bc400 in ?? ()
#4  0x00000009 in ?? ()
#5  0x00001386 in ?? ()
#6  0x080bc400 in ?? ()
#7  0x00000009 in ?? ()
#8  0xb73e4748 in ?? () from /usr/lib/libglib-2.0.so.0
#9  0x0807a308 in ?? ()
#10 0xbfbb5e44 in ?? ()
#11 0x00000001 in ?? ()
#12 0x00000001 in ?? ()
#13 0x0807a308 in ?? ()
#14 0x080bc400 in ?? ()
#15 0xb72a57b0 in ?? () from /lib/tls/i686/cmov/libc.so.6
#16 0xb748abe0 in ?? () from /lib/tls/i686/cmov/libpthread.so.0
#17 0xb7489440 in ?? () from /lib/tls/i686/cmov/libpthread.so.0
#18 0xb739b613 in g_thread_self () from /usr/lib/libglib-2.0.so.0
#19 0xb7381179 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#20 0xb7b4f044 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#21 0x0804c771 in main ()
.
Thread 1 (process 6305):
#0  0xb724599f in ?? () from /lib/tls/i686/cmov/libc.so.6
#1  0x00000001 in ?? ()
#2  0x00000001 in ?? ()
#3  0xb748a7fc in __pthread_mutex_unlock_usercnt ()
   from /lib/tls/i686/cmov/libpthread.so.0
#4  0xb724750f in ?? () from /lib/tls/i686/cmov/libc.so.6
#5  0x00000028 in ?? ()
#6  0x0809a050 in ?? ()
#7  0xb73067bc in ?? () from /lib/tls/i686/cmov/libc.so.6
#8  0x00000001 in ?? ()
#9  0x00000001 in ?? ()
#10 0xb748dec1 in __lll_mutex_unlock_wake ()
   from /lib/tls/i686/cmov/libpthread.so.0
#11 0x0001a150 in ?? ()
#12 0xb7306820 in ?? () from /lib/tls/i686/cmov/libc.so.6
#13 0xb731e120 in ?? () from /lib/tls/i686/cmov/libc.so.6
#14 0x0809b000 in ?? ()
#15 0xb6961338 in ?? ()
#16 0xb724ae30 in free () from /lib/tls/i686/cmov/libc.so.6
#17 0xb724ae30 in free () from /lib/tls/i686/cmov/libc.so.6
#18 0xb7530f59 in ?? () from /usr/lib/libcups.so.2
#19 0x080d7bf0 in ?? ()
#20 0x00000000 in ?? ()