Error in evolution while opening a mail folder

This error occurs when I click on a folder named "SPAM" in my folder list. I get the message when I then try to read the Trash folder and also a folder called "CS Department Mail".

I'm observing this problem as well (Edgy, last updated 2006-10-07). Additionally, if I select the Inbox folder in my IMAP account, then select the spam folder in that same account, and the go back to the Inbox folder, the following happens:
- About four of every five times Evolution crashes.
- When Evolution doesn't crash, it shows the error message copied by the original reporter when I select Inbox. From that point on, every attempt of selecting Inbox leads to the same error message and an empty summary window.

I tried to collect debug information with symbols. This is the backtrace as collected by bug buddy:

Distribution: Ubuntu 6.10 (edgy)
Gnome Release: 2.16.1 2006-10-02 (Ubuntu)
BugBuddy Version: 2.16.0

Memory status: size: 175222784 vsize: 0 resident: 175222784 share: 0 rss: 25444352 rss_rlim: 0
CPU usage: start_time: 1160255046 rtime: 0 utime: 217 stime: 0 cutime:199 cstime: 0 timeout: 18 it_real_value: 0 frequency: 0

Backtrace was generated from '/usr/bin/evolution-2.8'

Using host libthread_db library "/usr/lib/debug/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1233066320 (LWP 12205)]
[New Thread -1367376976 (LWP 12224)]
[New Thread -1358988368 (LWP 12223)]
[New Thread -1308066896 (LWP 12220)]
[New Thread -1299678288 (LWP 12214)]
[New Thread -1290007632 (LWP 12213)]
[New Thread -1281487952 (LWP 12211)]
0xb7145e91 in __waitpid_nocancel () from /usr/lib/debug/libc.so.6
#0 0xb7145e91 in __waitpid_nocancel () from /usr/lib/debug/libc.so.6
#1 0xb7e411b6 in gnome_gtk_module_info_get () from /usr/lib/libgnomeui-2.so.0
#2 0x0805f8e9 in segv_redirect (sig=11) at main.c:426
#3 <signal handler called>
#4 0xb70289ac in __lll_mutex_unlock_wake ()
   from /usr/lib/debug/libpthread.so.0
#5 0xb70259e9 in _L_mutex_unlock_94 () from /usr/lib/debug/libpthread.so.0
#6 0x0000001d in ?? ()
#7 0xb71d7ff4 in ?? () from /usr/lib/debug/libc.so.6
#8 0x0869c410 in ?? ()
#9 0x0823a828 in ?? ()
#10 0xbfcfd918 in ?? ()
#11 0xb70259e0 in __pthread_mutex_unlock (mutex=0xbfcfd928)
    at pthread_mutex_unlock.c:129
#12 0xb70259e0 in __pthread_mutex_unlock (mutex=0x8103fb8)
    at pthread_mutex_unlock.c:129
#13 0xb7184176 in pthread_mutex_unlock (mutex=0x8103fb8) at forward.c:183
#14 0xb722a276 in e_thread_put (e=0x8103fa8, msg=0x869c410) at e-msgport.c:1148
#15 0xb3db3e0c in ml_regen_timeout (m=0x869c410) at message-list.c:3923
#16 0xb3db4586 in message_list_thaw (ml=0x823a828) at message-list.c:3305
#17 0xb3d682ff in emfb_set_folder (emfv=0x8239000, folder=0x8573e00,
    uri=0x869c0f8 "imap://soto%40informatik.uni-kl.de@localhost:5993/INBOX")
    at em-folder-browser.c:1899
#18 0xb3d73902 in emfv_got_folder (
    uri=0x869c0f8 "imap://soto%40informatik.uni-kl.de@localhost:5993/INBOX",
    folder=0x8573e00, data=0x8239000) at em-folder-view.c:691
#19 0xb3da6656 in get_folder_got (mm=0x80ef6c8) at mail-ops.c:1230
#20 0xb3da6065 in mail_msgport_replied (source=0x80cd308, cond=G_IO_IN,
    d=0x81c1868) at mail-mt.c:461
#21 0xb755bc8d in g_io_channel_unix_get_fd () from /usr/lib/libglib-2.0.so.0
#22 0xb7532802 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#23 0xb75357df in g_main_context_check () from /us...

I just noticed bug #62192. Maybe it is unrelated, but I'm also observing the bogofilter and spamassassin error messages when starting Evolution. Both packages are installed in my machine. The error messages seem to appear irregardless of whether I enable or disable the plugins in Evolution's plugin box.

Thank you for your bug. The patch from upstream to fix that has been backported before edgy, marking the bug fixed. Feel free to reopen if that's not the case and you still get that problem with edgy or feisty