Comment 3 for bug 90312

Debug backtrace from the duplicate:

#0 0x00002b9f802e1bb1 in IA__gdk_draw_pixbuf (drawable=0x2b9f7fe7b590, gc=0x0, pixbuf=0x0, src_x=0, src_y=0, dest_x=0,
    dest_y=0, width=0, height=0, dither=GDK_RGB_DITHER_NONE, x_dither=0, y_dither=0) at gdkdraw.c:750
 __inst = <value optimized out>
 __t = 6503728
 __r = <value optimized out>
 __PRETTY_FUNCTION__ = "IA__gdk_draw_pixbuf"
#1 0x00002b9f7ee4d223 in fadeout_callback (fadeout=0x6a1ac0) at libgksu.c:296
 current_time = {tv_sec = 1173990474, tv_usec = 637637}
 elapsed = <value optimized out>
#2 0x00002b9f82bcba14 in IA__g_main_context_dispatch (context=0x63c540) at gmain.c:2045
No locals.
#3 0x00002b9f82bce85d in g_main_context_iterate (context=0x63c540, block=1, dispatch=1, self=<value optimized out>)
    at gmain.c:2677
 got_ownership = <value optimized out>
 max_priority = 200
 timeout = 0
 some_ready = 1
 nfds = <value optimized out>
 allocated_nfds = <value optimized out>
 fds = (GPollFD *) 0x87dca0
 __PRETTY_FUNCTION__ = "g_main_context_iterate"
#4 0x00002b9f82bceb6a in IA__g_main_loop_run (loop=0x961fe0) at gmain.c:2881
 got_ownership = <value optimized out>
 self = (GThread *) 0x63cab0
 __PRETTY_FUNCTION__ = "IA__g_main_loop_run"
#5 0x00002b9f7fdf4d4a in IA__gtk_dialog_run (dialog=0x94f000) at gtkdialog.c:996
 ri = {dialog = 0x0, response_id = -1, loop = 0x961fe0, destroyed = 0}
 response_handler = 38
 unmap_handler = 39
 destroy_handler = 41
 delete_handler = 40
 __PRETTY_FUNCTION__ = "IA__gtk_dialog_run"
#6 0x00002b9f7ee4d5c1 in report_failed_grab (what=<value optimized out>) at libgksu.c:562
 dialog = (GtkWidget *) 0x94f000
#7 0x00002b9f7ee4d85d in grab_keyboard_and_mouse (dialog=0x671b10) at libgksu.c:608
 FD = <value optimized out>
 fl = {l_type = 1, l_whence = 0, l_start = 0, l_len = 0, l_pid = 6953664}
 status = <value optimized out>
 grab_tries = 17
 lock = 16
 fname = <value optimized out>
 pid = <value optimized out>