Comment 3 for bug 913815

some more info:
$ sudo gdb synaptic
(gdb) run
Starting program: /usr/sbin/synaptic
[Thread debugging using libthread_db enabled]

(synaptic:3295): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(synaptic:3295): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(synaptic:3295): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(synaptic:3295): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
terminate called after throwing an instance of 'std::out_of_range'
  what(): vector::_M_range_check

Program received signal SIGABRT, Aborted.
0x00130416 in __kernel_vsyscall ()
(gdb) thread apply all bt

Thread 1 (Thread 0xb7fde880 (LWP 3295)):
#0 0x00130416 in __kernel_vsyscall ()
#1 0x00e96c8f in raise () from /lib/i386-linux-gnu/libc.so.6
#2 0x00e9a2b5 in abort () from /lib/i386-linux-gnu/libc.so.6
#3 0x00e114ed in __gnu_cxx::__verbose_terminate_handler() ()
   from /usr/lib/i386-linux-gnu/libstdc++.so.6
#4 0x00e0f283 in ?? () from /usr/lib/i386-linux-gnu/libstdc++.so.6
#5 0x00e0f2bf in std::terminate() ()
   from /usr/lib/i386-linux-gnu/libstdc++.so.6
#6 0x00e0f40e in __cxa_throw () from /usr/lib/i386-linux-gnu/libstdc++.so.6
#7 0x00db2c53 in std::__throw_out_of_range(char const*) ()
   from /usr/lib/i386-linux-gnu/libstdc++.so.6
#8 0x0805dc9a in ?? ()
#9 0x005c4093 in gtk_tree_model_iter_children ()
   from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
#10 0x01626644 in ?? () from /usr/lib/i386-linux-gnu/gtk-2.0/modules/libgail.so
#11 0x01626731 in ?? () from /usr/lib/i386-linux-gnu/gtk-2.0/modules/libgail.so
#12 0x0162ac9b in ?? () from /usr/lib/i386-linux-gnu/gtk-2.0/modules/libgail.so
#13 0x0103fac6 in atk_object_get_n_accessible_children ()
   from /usr/lib/i386-linux-gnu/libatk-1.0.so.0
#14 0x0162ead8 in ?? () from /usr/lib/i386-linux-gnu/gtk-2.0/modules/libgail.so
#15 0x010402bd in atk_object_get_index_in_parent ()
---Type <return> to continue, or q <return> to quit---
   from /usr/lib/i386-linux-gnu/libatk-1.0.so.0
#16 0x010403a0 in ?? () from /usr/lib/i386-linux-gnu/libatk-1.0.so.0
#17 0x0162eb61 in ?? () from /usr/lib/i386-linux-gnu/gtk-2.0/modules/libgail.so
#18 0x0160a18a in ?? () from /usr/lib/i386-linux-gnu/gtk-2.0/modules/libgail.so
#19 0x01040266 in atk_object_ref_state_set ()
   from /usr/lib/i386-linux-gnu/libatk-1.0.so.0
#20 0x01656578 in ?? () from /usr/lib/gtk-2.0/modules/libatk-bridge.so
#21 0x009a3110 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#22 0x009a725f in g_main_context_dispatch ()
   from /lib/i386-linux-gnu/libglib-2.0.so.0
#23 0x009a7990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0x009a7c2a in g_main_context_iteration ()
   from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0x004cb231 in gtk_main_iteration ()
   from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
#26 0x0806e7fd in ?? ()
#27 0x08058a51 in ?? ()
#28 0x00e82113 in __libc_start_main () from /lib/i386-linux-gnu/libc.so.6
#29 0x0805b621 in ?? ()
Backtrace stopped: Not enough registers or memory available to unwind further