(gdb) r
Starting program: /usr/bin/empathy 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[New Thread 0xb2e95b40 (LWP 5871)]
[New Thread 0xb24ffb40 (LWP 5872)]

(empathy:5868): Gtk-WARNING **: Theme parsing error: gnome-panel.css:28:11: Not using units is deprecated. Assuming 'px'.
[New Thread 0xb1affb40 (LWP 5873)]
[New Thread 0xab4adb40 (LWP 5877)]
[New Thread 0xaaaffb40 (LWP 5880)]

(empathy-accounts:5876): Gtk-WARNING **: Theme parsing error: gnome-panel.css:28:11: Not using units is deprecated. Assuming 'px'.

(empathy-accounts:5879): Gtk-WARNING **: Theme parsing error: gnome-panel.css:28:11: Not using units is deprecated. Assuming 'px'.
[Thread 0xb1affb40 (LWP 5873) exited]
[Thread 0xaaaffb40 (LWP 5880) exited]
^C
Program received signal SIGINT, Interrupt.
0xb5938fdd in g_datalist_id_set_data_full ()
   from /lib/i386-linux-gnu/libglib-2.0.so.0
(gdb) bt
#0  0xb5938fdd in g_datalist_id_set_data_full ()
   from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0xb5a19159 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#2  0xb5a1a1a2 in g_object_unref ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#3  0xb7e7552f in ?? () from /usr/lib/libfolks.so.25
#4  0xb7e7836f in ?? () from /usr/lib/libfolks.so.25
#5  0xb7e789c0 in folks_individual_set_personas () from /usr/lib/libfolks.so.25
#6  0xb7e78df0 in ?? () from /usr/lib/libfolks.so.25
#7  0xb5a1bf50 in g_object_newv ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#8  0xb5a1c543 in g_object_new_valist ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#9  0xb5a1c7a0 in g_object_new ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#10 0xb7e75285 in folks_individual_construct () from /usr/lib/libfolks.so.25
#11 0xb7e791c4 in folks_individual_new () from /usr/lib/libfolks.so.25
#12 0xb7e7aef6 in ?? () from /usr/lib/libfolks.so.25
#13 0xb7e7d4de in ?? () from /usr/lib/libfolks.so.25
#14 0xb7e85b04 in ?? () from /usr/lib/libfolks.so.25
#15 0xb5a15484 in g_closure_invoke ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#16 0xb5a270d9 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#17 0xb5a2f2dc in g_signal_emit_valist ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#18 0xb5a2f8af in g_signal_emit_by_name ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#19 0xb7e85f07 in _folks_persona_store_emit_personas_changed ()
   from /usr/lib/libfolks.so.25
#20 0xb1217c8e in ?? () from /usr/lib/libfolks-eds.so.25
#21 0xb5a18541 in g_cclosure_marshal_VOID__POINTERv ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#22 0xb5a15727 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#23 0xb5a2ea29 in g_signal_emit_valist ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#24 0xb5a2f453 in g_signal_emit ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#25 0xb7f832f7 in ?? () from /usr/lib/libebook-1.2.so.12
#26 0xb5a18333 in g_cclosure_marshal_VOID__BOXED ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#27 0xb5a15484 in g_closure_invoke ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#28 0xb5a270d9 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#29 0xb5a2f2dc in g_signal_emit_valist ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#30 0xb5a2f453 in g_signal_emit ()
---Type <return> to continue, or q <return> to quit---
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#31 0xb56a25ee in e_gdbus_proxy_emit_signal ()
   from /usr/lib/libedataserver-1.2.so.15
#32 0xb7fa162f in ?? () from /usr/lib/libebook-1.2.so.12
#33 0xb46a735a in ffi_call_SYSV () from /usr/lib/i386-linux-gnu/libffi.so.6
#34 0xb46a708f in ffi_call () from /usr/lib/i386-linux-gnu/libffi.so.6
#35 0xb5a15d94 in g_cclosure_marshal_generic ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#36 0xb5a142fd in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#37 0xb5a15484 in g_closure_invoke ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#38 0xb5a2770d in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#39 0xb5a2f2dc in g_signal_emit_valist ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#40 0xb5a2f453 in g_signal_emit ()
   from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#41 0xb5b224d7 in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#42 0xb5b103c6 in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#43 0xb5953850 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#44 0xb5955d86 in g_main_context_dispatch ()
   from /lib/i386-linux-gnu/libglib-2.0.so.0
#45 0xb5956125 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#46 0xb5956201 in g_main_context_iteration ()
---Type <return> to continue, or q <return> to quit---
   from /lib/i386-linux-gnu/libglib-2.0.so.0
#47 0xb5aee824 in g_application_run ()
   from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#48 0x08074ea2 in main ()

These are the output in the gdb debugger. I interrupt it when the empathy window freezes. Not sure if it helps.