I think what I used should be dapper. "#uname -a" returns "Linux Ubuntu-2 2.6.15-8-386 #1 PREEMPT 
Tue Dec 13 03:21:39 UTC 2005 i686 GNU/Linux"
My computer is i386 architecture, why i686 appeard? 

Followed is the bugbuddy info after I installed gedit-common_2.13.1-0ubuntu1_all.deb, wish they 
are helpful:

Backtrace was generated from '/usr/bin/gedit'

(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(no debugging symbols found)
`system-supplied DSO at 0xffffe000' has disappeared; keeping its symbols.
(no debugging symbols found)
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[Thread debugging using libthread_db enabled]
[New Thread -1225107776 (LWP 5036)]
0xffffe410 in __kernel_vsyscall ()
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb76c5463 in __waitpid_nocancel ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb7f68226 in libgnomeui_module_info_get ()
   from /usr/lib/libgnomeui-2.so.0
#3  <signal handler called>
#4  0x08091f9d in gedit_utils_get_window_workspace ()
#5  0x08066485 in _gedit_app_get_window_in_workspace ()
#6  0x0806540a in bacon_message_connection_new ()
#7  0x0806471b in gedit_marshal_VOID__BOXED_BOXED ()
#8  0xb76478dc in g_io_unix_dispatch (source=0x83fd520, 
    callback=0x8064694 <gedit_marshal_VOID__BOXED_BOXED+274>, user_data=0x0)
    at giounix.c:162
#9  0xb76214e7 in IA__g_main_context_dispatch (context=0x8106238)
    at gmain.c:1913
#10 0xb76244d6 in g_main_context_iterate (context=0x8106238, block=1, 
    dispatch=1, self=0x80ea080) at gmain.c:2544
#11 0xb76247f8 in IA__g_main_loop_run (loop=0x8404708) at gmain.c:2748
#12 0xb7c4eda5 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#13 0x08065b65 in main ()

Thread 1 (Thread -1225107776 (LWP 5036)):
#0  0xffffe410 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb76c5463 in __waitpid_nocancel ()
   from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#2  0xb7f68226 in libgnomeui_module_info_get ()
   from /usr/lib/libgnomeui-2.so.0
No symbol table info available.
#3  <signal handler called>
No symbol table info available.
#4  0x08091f9d in gedit_utils_get_window_workspace ()
No symbol table info available.
#5  0x08066485 in _gedit_app_get_window_in_workspace ()
No symbol table info available.
#6  0x0806540a in bacon_message_connection_new ()
No symbol table info available.
#7  0x0806471b in gedit_marshal_VOID__BOXED_BOXED ()
No symbol table info available.
#8  0xb76478dc in g_io_unix_dispatch (source=0x83fd520, 
    callback=0x8064694 <gedit_marshal_VOID__BOXED_BOXED+274>, user_data=0x0)
    at giounix.c:162
	buffer_condition = 135496256
#9  0xb76214e7 in IA__g_main_context_dispatch (context=0x8106238)
    at gmain.c:1913
No locals.
#10 0xb76244d6 in g_main_context_iterate (context=0x8106238, block=1, 
    dispatch=1, self=0x80ea080) at gmain.c:2544
	got_ownership = <value optimized out>
	max_priority = 0
	timeout = 0
	some_ready = 1
	nfds = <value optimized out>
	allocated_nfds = <value optimized out>
	fds = (GPollFD *) 0x840c8a8
	__PRETTY_FUNCTION__ = "g_main_context_iterate"
#11 0xb76247f8 in IA__g_main_loop_run (loop=0x8404708) at gmain.c:2748
	got_ownership = -1217655200
	self = (GThread *) 0x80ea080
	__PRETTY_FUNCTION__ = "IA__g_main_loop_run"
#12 0xb7c4eda5 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#13 0x08065b65 in main ()
No symbol table info available.
#0  0xffffe410 in __kernel_vsyscall ()