I'm not sure if I did everything right but here should be the backtrace:

(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /usr/bin/gaim 
[Thread debugging using libthread_db enabled]
[New Thread -1223076176 (LWP 11529)]
[New Thread -1238783072 (LWP 11537)]
libnm_glib_nm_state_cb: dbus returned an error.
  (org.freedesktop.DBus.Error.ServiceUnknown) The name org.freedesktop.NetworkManager was not provided by any .service files

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1223076176 (LWP 11529)]
IA__g_utf8_validate (str=0x0, max_len=-1, end=0x0) at gutf8.c:1561
1561    gutf8.c: No such file or directory.
        in gutf8.c
(gdb) bt full
#0  IA__g_utf8_validate (str=0x0, max_len=-1, end=0x0) at gutf8.c:1561
        p = <value optimized out>
#1  0xb79bb6cf in strdup_len (string=0x0, len=-1, bytes_written=0x0, 
    bytes_read=0x0, error=0x0) at gconvert.c:984
        real_len = <value optimized out>
#2  0xb79bbe11 in IA__g_filename_from_utf8 (utf8string=0x0, len=-1, 
    bytes_read=0x0, bytes_written=0x0, error=0x0) at gconvert.c:1362
        charset = <value optimized out>
#3  0xb794635a in prefs_start_element_handler (context=0x82acaa0, 
    element_name=0x82ad6f8 "pref", attribute_names=0x8333ba8, 
    attribute_values=0x829b070, user_data=0x0, error=0xbf816630)
    at ../../libgaim/prefs.c:323
        pref = <value optimized out>
        pref_type = GAIM_PREF_PATH
        pref_name = 0x8173a08 "last_icon_folder"
        pref_value = 0x0
        pref_name_full = (GString *) 0x82f9e90
        tmp = <value optimized out>
#4  0xb79d656b in IA__g_markup_parse_context_parse (context=0x82acaa0, 
    text=0x8333bd8 "<?xml version='1.0' encoding='UTF-8' ?>\n\n<pref version='1' name='/'>\n\t<pref name='core'>\n\t\t<pref name='away'>\n\t\t\t<pref name='idle_reporting' type='string' value='system'/>\n\t\t\t<pref name='away_when_idl"..., text_len=24324, error=0x0) at gmarkup.c:1321
---Type <return> to continue, or q <return> to quit---
        start_name = (const gchar *) 0x82ad6f8 "pref"
        empty = (const gchar *) 0x0
        attr_names = <value optimized out>
        attr_values = (const gchar **) 0x829b070
        tmp_error = (GError *) 0x0
        first_invalid = (const gchar *) 0x8339adc ""
        __PRETTY_FUNCTION__ = "IA__g_markup_parse_context_parse"
#5  0xb7945cd1 in gaim_prefs_load () at ../../libgaim/prefs.c:404
        filename = (gchar *) 0x829b000 "/home/jonsson/.gaim/prefs.xml"
        contents = (
    gchar *) 0x8333bd8 "<?xml version='1.0' encoding='UTF-8' ?>\n\n<pref version='1' name='/'>\n\t<pref name='core'>\n\t\t<pref name='away'>\n\t\t\t<pref name='idle_reporting' type='string' value='system'/>\n\t\t\t<pref name='away_when_idl"...
        length = 24324
        context = (GMarkupParseContext *) 0x82acaa0
        error = (GError *) 0x0
#6  0x080ae03c in main (argc=Cannot access memory at address 0xffffffff
) at ../../gtk/gtkmain.c:717
        display = <value optimized out>
        opt_help = 0
        opt_login = 0
        opt_nologin = 0
        opt_version = <value optimized out>
---Type <return> to continue, or q <return> to quit---
        opt_config_dir_arg = 0x0
        opt_login_arg = 0x0
        opt_session_arg = 0x0
        accounts = <value optimized out>
        sig_indx = <value optimized out>
        sigset = {__val = {90119, 0 <repeats 31 times>}}
        prev_sig_disp = <value optimized out>
        errmsg = "�_��\000\000\000\000?67��h\201��g\201��_��\002\000\000\000\000\000\000\0008h\201�U���\b\000\000\000\b\000\000\000\000\000\000\000�\204\201��u��\234L,�\220L,�\b\000\000\000\000\000\000\000\000`}�\000\000\000\000�\204\201��\204\201��\204\201�\030f���7��\006\000\000\000!���\000\000\000\000�_��\000\000\000\000�\2067� i\201�Hh\201��_��\002\000\000\000\000\000\000\000�h\201�U���\b\000\000\000\b\000\000\000\000\000\000\000�\204\201��u��\204L,�xL,�\b\000\000\000\226\212���\204\201�\000\000\000\000"...
        segfault_message_tmp = <value optimized out>
        error = (GError *) 0x0
        opt = <value optimized out>
        gui_check = <value optimized out>
        debug_enabled = 0
        long_options = {{name = 0x80e806d "config", has_arg = 1, flag = 0x0, 
    val = 99}, {name = 0x80db70c "debug", has_arg = 0, flag = 0x0, val = 100}, 
  {name = 0x80dd576 "help", has_arg = 0, flag = 0x0, val = 104}, {
    name = 0x80e89c8 "login", has_arg = 2, flag = 0x0, val = 108}, {
---Type <return> to continue, or q <return> to quit---
    name = 0x80e548b "nologin", has_arg = 0, flag = 0x0, val = 110}, {
    name = 0x80e8063 "session", has_arg = 1, flag = 0x0, val = 115}, {
    name = 0x80de97c "version", has_arg = 0, flag = 0x0, val = 118}, {
    name = 0x0, has_arg = 0, flag = 0x0, val = 0}}