Steps to reproduce:
1.Create a new user such as "new_user" 
2.Logout desktop and relogin with "new_user"
3.Start evolution
4.Configure a new IMAP account

Evolution will crash.


Stack trace:
  [1] __lwp_kill(0x1, 0x5), at 0xcfba8fa5
  [2] _thr_kill(0x1, 0x5), at 0xcfba5b64
  [3] raise(0x5), at 0xcfb6dd14
  [4] g_logv(0xccbffb38, 0x8, 0xccbffb48, 0x8046604), at 0xd0cb11b5
  [5] g_log(0xccbffb38, 0x8, 0xccbffb48, 0xccc2f200, 0x350, 0xccc2f218), at
0xd0cb127d
=>[6] em_folder_tree_model_remove_uri(model = 0x81bace0, uri = (nil)), line 848
in "em-folder-tree-model.c"
  [7] em_folder_tree_model_remove_folders(model = 0x81bace0, si = 0x86022c8,
toplevel = 0x80466c4), line 901 in "em-folder-tree-model.c"
  [8] em_folder_tree_model_remove_folders(model = 0x81bace0, si = 0x86022c8,
toplevel = 0x804670c), line 887 in "em-folder-tree-model.c"
  [9] em_folder_tree_model_remove_store(model = 0x81bace0, store = 0x857bb00),
line 931 in "em-folder-tree-model.c"
  [10] em_folder_tree_model_add_store(model = 0x81bace0, store = 0x857bb00,
display_name = 0x8270218 "jeff.cai@sun.com"), line 785 in "em-folder-tree-model.c"
  [11] mc_add_store(component = 0x81bd6c0, store = 0x857bb00, name = 0x8535f88
"jeff.cai@sun.com", done = (nil)), line 233 in "mail-component.c"
  [12] mail_component_add_store(component = 0x81bd6c0, store = 0x857bb00, name =
0x8535f88 "jeff.cai@sun.com"), line 1153 in "mail-component.c"
  [13] add_new_store(uri = 0x857eb00
"imap://qc161282@mail-apac.sun.com/;filter;use_ssl=always;command=ssh%20-C%20-l%20%25u%20%25h%20exec%20/usr/sbin/imapd;use_lsub",
store = 0x857bb00, user_data = 0x80b49e0), line 2640 in "em-account-editor.c"
  [14] get_store_got(mm = 0x82bb7c0), line 1305 in "mail-ops.c"
  [15] mail_msgport_replied(source = 0x82e3aa8, cond = G_IO_IN, d = 0x82e3f00),
line 461 in "mail-mt.c"
  [16] g_io_unix_dispatch(0x816dfe8, 0xccbb4710, 0x82e3f00), at 0xd0ccf67b
  [17] g_main_dispatch(0x80b45b8), at 0xd0ca9664
  [18] g_main_context_dispatch(0x80b45b8), at 0xd0caa74d
  [19] g_main_context_iterate(0x80b45b8, 0x1, 0x1, 0x80986f0), at 0xd0caab6d
  [20] g_main_loop_run(0x8299df0), at 0xd0cab172
  [21] bonobo_main(0x8046c54, 0x8046ae8, 0xd27fb840, 0xcfbf3580, 0xcf8a2000,
0x81642c0), at 0xd178f40e
  [22] main(argc = 1, argv = 0x8046b2c), line 610 in "main.c"


Other information:
The output of screen is :
evolution-mail-CRITICAL **: file em-folder-tree-model.c: line 848: assertion
`uri != NULL' failed
aborting...