Sebastien Bacher wrote:
> - gdb yelp
> (gdb) run 
> .... crash
> (gdb) thread apply all bt

Backtrace:

Thread 7 (Thread 1124096352 (LWP 9127)):
#0  0x00002aaab00a9c8f in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib/libpthread.so.0
#1  0x00002aaaaff88c0d in PR_Lock () from /usr/lib/libnspr4.so
#2  0x00002aaaaff88f7d in PR_WaitCondVar () from /usr/lib/libnspr4.so
#3  0x00002aaab64474bf in NSGetModule ()
    from /usr/lib/firefox/components/libnecko.so
#4  0x00002aaaaff8de9c in PR_Select () from /usr/lib/libnspr4.so
#5  0x00002aaab00a70fa in start_thread () from /lib/libpthread.so.0
#6  0x00002aaab0810d32 in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 6 (Thread 1115703648 (LWP 9126)):
#0  0x00002aaab00a9c8f in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib/libpthread.so.0
#1  0x00002aaaaff88c0d in PR_Lock () from /usr/lib/libnspr4.so
#2  0x00002aaaaff88f7d in PR_WaitCondVar () from /usr/lib/libnspr4.so
#3  0x00002aaab64474bf in NSGetModule ()
    from /usr/lib/firefox/components/libnecko.so
#4  0x00002aaaaff8de9c in PR_Select () from /usr/lib/libnspr4.so
#5  0x00002aaab00a70fa in start_thread () from /lib/libpthread.so.0
#6  0x00002aaab0810d32 in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 5 (Thread 1107310944 (LWP 9125)):
#0  0x00002aaab00a9c8f in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib/libpthread.so.0
#1  0x00002aaaaff88c0d in PR_Lock () from /usr/lib/libnspr4.so
#2  0x00002aaaaff88f7d in PR_WaitCondVar () from /usr/lib/libnspr4.so
#3  0x00002aaab64474bf in NSGetModule ()
    from /usr/lib/firefox/components/libnecko.so
#4  0x00002aaaaff8de9c in PR_Select () from /usr/lib/libnspr4.so
#5  0x00002aaab00a70fa in start_thread () from /lib/libpthread.so.0
#6  0x00002aaab0810d32 in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 4 (Thread 1098918240 (LWP 9124)):
#0  0x00002aaab00a9c8f in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib/libpthread.so.0
#1  0x00002aaaaff88c0d in PR_Lock () from /usr/lib/libnspr4.so
#2  0x00002aaaaff88f7d in PR_WaitCondVar () from /usr/lib/libnspr4.so
#3  0x00002aaab64474bf in NSGetModule ()
    from /usr/lib/firefox/components/libnecko.so
#4  0x00002aaaaff8de9c in PR_Select () from /usr/lib/libnspr4.so
#5  0x00002aaab00a70fa in start_thread () from /lib/libpthread.so.0
#6  0x00002aaab0810d32 in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 1090525536 (LWP 9118)):
#0  0x00002aaab00a9c8f in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib/libpthread.so.0
#1  0x00002aaaaff88c0d in PR_Lock () from /usr/lib/libnspr4.so
#2  0x00002aaaaff88f7d in PR_WaitCondVar () from /usr/lib/libnspr4.so
#3  0x00002aaab0a04b20 in NS_NewThread ()
    from /usr/lib/firefox/libxpcom_core.so
#4  0x00002aaab0a027ac in nsIThread::IsMainThread ()
    from /usr/lib/firefox/libxpcom_core.so
#5  0x00002aaaaff8de9c in PR_Select () from /usr/lib/libnspr4.so
#6  0x00002aaab00a70fa in start_thread () from /lib/libpthread.so.0
#7  0x00002aaab0810d32 in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()

Thread 2 (Thread 1082132832 (LWP 9117)):
#0  0x00002aaab0807e72 in poll () from /lib/libc.so.6
#1  0x00002aaaaff8c8df in PR_Poll () from /usr/lib/libnspr4.so
#2  0x00002aaab64685d0 in NSGetModule ()
    from /usr/lib/firefox/components/libnecko.so
#3  0x00002aaab6468d23 in NSGetModule ()
    from /usr/lib/firefox/components/libnecko.so
#4  0x00002aaab0a027ac in nsIThread::IsMainThread ()
    from /usr/lib/firefox/libxpcom_core.so
#5  0x00002aaaaff8de9c in PR_Select () from /usr/lib/libnspr4.so
#6  0x00002aaab00a70fa in start_thread () from /lib/libpthread.so.0
#7  0x00002aaab0810d32 in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 46912600630864 (LWP 9106)):
#0  0x00002aaaae4daa78 in CORBA_free () from /usr/lib/libORBit-2.so.0
#1  0x00002aaaae4da9b9 in ORBit_free_T () from /usr/lib/libORBit-2.so.0
#2  0x00002aaaae4da9fd in ORBit_free () from /usr/lib/libORBit-2.so.0
#3  0x00002aaab8400fd9 in gnome_accessibility_module_shutdown ()
    from /usr/lib/gtk-2.0/modules/libatk-bridge.so
#4  0x00002aaab8401773 in gnome_accessibility_module_shutdown ()
    from /usr/lib/gtk-2.0/modules/libatk-bridge.so
#5  0x00002aaaae62e7fd in g_signal_stop_emission ()
    from /usr/lib/libgobject-2.0.so.0
#6  0x00002aaaae62ffcc in g_signal_emit_valist ()
    from /usr/lib/libgobject-2.0.so.0
#7  0x00002aaaae630383 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#8  0x00002aaaac358c61 in atk_object_initialize ()
    from /usr/lib/libatk-1.0.so.0
#9  0x00002aaaae61f910 in g_closure_invoke () from 
/usr/lib/libgobject-2.0.so.0
#10 0x00002aaaae62e630 in g_signal_stop_emission ()
    from /usr/lib/libgobject-2.0.so.0
#11 0x00002aaaae62ffcc in g_signal_emit_valist ()
    from /usr/lib/libgobject-2.0.so.0
#12 0x00002aaaae630383 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#13 0x00002aaaae621289 in g_object_interface_list_properties ()
    from /usr/lib/libgobject-2.0.so.0
#14 0x00002aaaae6249ef in g_object_notify () from 
/usr/lib/libgobject-2.0.so.0
#15 0x00002aaab161287a in NSGetModule ()
    from /usr/lib/firefox/components/libaccessibility.so
#16 0x00002aaab8401cbf in gnome_accessibility_module_shutdown ()
    from /usr/lib/gtk-2.0/modules/libatk-bridge.so
#17 0x00002aaaae62e7fd in g_signal_stop_emission ()
    from /usr/lib/libgobject-2.0.so.0
#18 0x00002aaaae62ffcc in g_signal_emit_valist ()
    from /usr/lib/libgobject-2.0.so.0
#19 0x00002aaaae63382d in g_signal_emit_by_name ()
    from /usr/lib/libgobject-2.0.so.0
#20 0x0000000000416c25 in yelp_html_printf ()
#21 0x00002aaaae98696b in g_main_context_is_owner ()
    from /usr/lib/libglib-2.0.so.0
#22 0x00002aaaae984acd in g_main_context_dispatch ()
    from /usr/lib/libglib-2.0.so.0
#23 0x00002aaaae987d95 in g_main_context_check ()
    from /usr/lib/libglib-2.0.so.0
#24 0x00002aaaae98805a in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#25 0x00002aaaae002385 in bonobo_main () from /usr/lib/libbonobo-2.so.0
#26 0x00000000004238b6 in main ()