What were you doing when the application crashed?
I go to menu "persons" and then to "new contact". That's all. 
I am new to gimmie, so i dont really know the exact function of the "new contact" button. I have just played aroud. Also, I have not created any "persons" or "contacts" with gimmie yet. I've got a new ubuntu installation. 
I just looked in the crash report. It seems to have to do with synaptic. For your information Synaptic was running while the error occured. 


Distribution: Ubuntu 7.04 (feisty)
Gnome Release: 2.18.1 2007-04-10 (Ubuntu)
BugBuddy Version: 2.18.1

System: Linux 2.6.20-16-generic #2 SMP Thu Jun 7 20:19:32 UTC 2007 i686
X Vendor: The X.Org Foundation
X Vendor Release: 70200000
Selinux: No
Accessibility: Disabled
GTK+ Theme: Human
Icon Theme: Human

Memory status: size: 0 vsize: 0 resident: 0 share: 0 rss: 0 rss_rlim: 0
CPU usage: start_time: 0 rtime: 0 utime: 0 stime: 0 cutime:0 cstime: 0 timeout: 0 it_real_value: 0 frequency: 0



----------- .xsession-errors (1093 sec old) ---------------------
(synaptic:5161): Gtk-CRITICAL **: gtk_tree_view_unref_tree_helper: assertion `node != NULL' failed
Another synaptic is running. Trying to bring it to the foreground
(synaptic:5161): Gtk-CRITICAL **: gtk_tree_view_unref_tree_helper: assertion `node != NULL' failed
(synaptic:5161): Gtk-CRITICAL **: gtk_tree_view_unref_tree_helper: assertion `node != NULL' failed
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
--------------------------------------------------
Traceback (most recent call last):

+ Trace 155476