Steps to reproduce:
1. creating an email, entering address
2. 
3. 


Stack trace:
 0xb6f6f9ff in get_range_at_position (string=0x0, pos=0, start_pos=0xbfb00004, end_pos=0xbfb00000) at e-name-selector-entry.c:243
/home/rthompso/src/svn/evolution-data-server/libedataserverui/e-name-selector-entry.c:243:7461:beg:0xb6f6f9ff

(gdb) print string
$6 = (const gchar *) 0x0


 241         gint         i;
 242 
 243         for (p = string, i = 0; *p; p = g_utf8_next_char (p), i++) {
 244                 gunichar c = g_utf8_get_char (p);
 245 
 246                 if (c == '"') {
 247                         quoted = ~quoted;
 248                 } else if (c == ',' && !quoted) {
 249                         if (i < pos) {
 250                                 /* Start right after comma */
 251                                 local_start_pos = i + 1;
 252                         } else {
 253                                 /* Stop right before comma */
 254                                 local_end_pos = i;
 255                                 break;

Other information:
svn build 2007-04-30