[tack@caladan ~]$ gdb nautilus 
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This GDB was configured as "i486-linux-gnu"...
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(gdb) run .
Starting program: /usr/bin/nautilus .
Failed to read a valid object file image from memory.
[Thread debugging using libthread_db enabled]
[New Thread -1228257616 (LWP 21820)]
Initializing gnome-mount extension
[New Thread -1279632496 (LWP 21844)]
[New Thread -1288025200 (LWP 21845)]
[New Thread -1296417904 (LWP 21846)]
[New Thread -1304810608 (LWP 21847)]
[New Thread -1313203312 (LWP 21848)]
[New Thread -1321596016 (LWP 21849)]
[New Thread -1329988720 (LWP 21850)]
[New Thread -1338381424 (LWP 21851)]
[New Thread -1346774128 (LWP 21852)]
[New Thread -1355166832 (LWP 21853)]
[Thread -1346774128 (LWP 21852) exited]
[Thread -1279632496 (LWP 21844) exited]
[Thread -1288025200 (LWP 21845) exited]
[Thread -1355166832 (LWP 21853) exited]
[Thread -1338381424 (LWP 21851) exited]
[Thread -1296417904 (LWP 21846) exited]
[Thread -1329988720 (LWP 21850) exited]
[Thread -1321596016 (LWP 21849) exited]
[Thread -1313203312 (LWP 21848) exited]
[Thread -1304810608 (LWP 21847) exited]
[New Thread -1313203312 (LWP 21856)]
[New Thread -1304810608 (LWP 21857)]
[New Thread -1279632496 (LWP 21858)]
[New Thread -1321596016 (LWP 21859)]

** ERROR **: file nautilus-navigation-window.c: line 834 (activate_nth_short_list_item): assertion failed: (index < g_list_length (window->details->short_list_viewers))
aborting...

Program received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread -1228257616 (LWP 21820)]
0xb7507d4b in g_logv () from /usr/lib/libglib-2.0.so.0
(gdb) thread apply all bt

Thread 15 (Thread -1321596016 (LWP 21859)):
#0  0xffffe410 in ?? ()
#1  0xb13a0318 in ?? ()
#2  0x0000003b in ?? ()
#3  0x00000000 in ?? ()

Thread 14 (Thread -1279632496 (LWP 21858)):
#0  0xffffe410 in ?? ()
#1  0xb3ba4fc4 in ?? ()
#2  0x000001b6 in ?? ()
#3  0x00008000 in ?? ()
#4  0xb72d001b in open () from /lib/tls/i686/cmov/libc.so.6
#5  0xb7270d22 in __GI__IO_file_open () from /lib/tls/i686/cmov/libc.so.6
#6  0xb7270ec5 in _IO_new_file_fopen () from /lib/tls/i686/cmov/libc.so.6
#7  0xb726593d in __fopen_internal () from /lib/tls/i686/cmov/libc.so.6
#8  0xb7267ebc in fopen64 () from /lib/tls/i686/cmov/libc.so.6
#9  0xb7676621 in gnome_vfs_get_file_mime_type_internal (
    path=0x8516000 "/home/tack/.lesshst", 
    optional_stat_info=<value optimized out>, suffix_only=32768, 
    suffix_first=1) at gnome-vfs-mime.c:476
#10 0xb6b129f1 in get_mime_type (info=0x8476308, 
    full_name=0x1b6 <Address 0x1b6 out of bounds>, options=32768, 
    stat_buffer=0xb3ba5148) at file-method.c:703
#11 0xb6b131aa in do_read_directory (method=0xb6b184e0, 
    method_handle=0x8400c98, file_info=0x8476308, context=0x83e5128)
    at file-method.c:1144
#12 0xb76694e6 in gnome_vfs_directory_read_next_cancellable (handle=0x842d358, 
    file_info=0x8476308, context=0x83e5128) at gnome-vfs-directory.c:234
#13 0xb766eaaf in _gnome_vfs_job_execute (job=0x841ecb8)
    at gnome-vfs-job.c:1477
#14 0xb766dbca in thread_entry_point (data=0x841ecb8, user_data=0x0)
    at gnome-vfs-job-queue.c:65
#15 0xb7524438 in ?? () from /usr/lib/libglib-2.0.so.0
#16 0x0841ecb8 in ?? ()
#17 0x00000000 in ?? ()

Thread 13 (Thread -1304810608 (LWP 21857)):
#0  0xffffe410 in ?? ()
#1  0xb23a2318 in ?? ()
#2  0x0000003d in ?? ()
#3  0x00000000 in ?? ()

Thread 12 (Thread -1313203312 (LWP 21856)):
#0  0xffffe410 in ?? ()
#1  0xb1ba1318 in ?? ()
#2  0x00000039 in ?? ()
#3  0x00000000 in ?? ()

Thread 1 (Thread -1228257616 (LWP 21820)):
#0  0xb7507d4b in g_logv () from /usr/lib/libglib-2.0.so.0
#1  0xb7507fc9 in g_log () from /usr/lib/libglib-2.0.so.0
#2  0xb7508046 in g_assert_warning () from /usr/lib/libglib-2.0.so.0
#3  0x08095f1a in view_as_menu_switch_views_callback (combo_box=0xb758a29c, 
    window=0x8158f83) at nautilus-navigation-window.c:834
#4  0xb75a3229 in g_cclosure_marshal_VOID__VOID ()
   from /usr/lib/libgobject-2.0.so.0
#5  0xb75957c3 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#6  0xb75a7735 in ?? () from /usr/lib/libgobject-2.0.so.0
#7  0x0835fee0 in ?? ()
#8  0x00000000 in ?? ()
(gdb)