Description of problem:

Evolution crashes at start-up, moments after displaying the main mail window.

Gdb output:

GNU gdb Red Hat Linux (6.6-24.fc8rh)
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This GDB was configured as "i386-redhat-linux-gnu"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) r
Starting program: /usr/bin/evolution 
[Thread debugging using libthread_db enabled]
[New process 4906]
[New Thread -1208183024 (LWP 4906)]
Loading Bogofilter as the default junk plugin
[New Thread -1259377776 (LWP 4916)]
[New Thread -1269867632 (LWP 4917)]
[Thread -1269867632 (LWP 4917) exited]
[New Thread -1269867632 (LWP 4918)]
[New Thread -1280750704 (LWP 4919)]
[New Thread -1291240560 (LWP 4921)]
get suckfish pop://suckfish.co.nz/
[New Thread -1301759088 (LWP 4924)]
[Thread -1280750704 (LWP 4919) exited]
[Thread -1291240560 (LWP 4921) exited]
[Thread -1301759088 (LWP 4924) exited]
[New Thread -1291240560 (LWP 4925)]
opening pop3 INBOX folder
[Thread -1291240560 (LWP 4925) exited]
[Thread -1259377776 (LWP 4916) exited]
[New Thread -1259377776 (LWP 4926)]
[New Thread -1291240560 (LWP 4927)]
[Thread -1259377776 (LWP 4926) exited]
[Thread -1291240560 (LWP 4927) exited]
[New Thread -1291240560 (LWP 4934)]
[New Thread -1259377776 (LWP 4935)]
[New Thread -1301759088 (LWP 4936)]

(evolution:4906): evolution-mail-CRITICAL **: mail_tool_uri_to_folder: assertion
`uri != NULL' failed

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1208183024 (LWP 4906)]
0x06364f73 in strchr () from /lib/libc.so.6
(gdb) bt
#0  0x06364f73 in strchr () from /lib/libc.so.6
#1  0x002e8fa6 in camel_url_new_with_base (base=0x0, url_string=0x0) at
camel-url.c:74
#2  0x002e99da in camel_url_new (url_string=0x0, ex=0x0) at camel-url.c:299
#3  0x0729cb6e in enable_folder_tree (emfb=0x8654800, emft=0x87a4860) at
mail-component.c:668
#4  0x010133a9 in IA__g_cclosure_marshal_VOID__VOID (closure=0x87cc230,
return_value=0x0, n_param_values=1, param_values=0xbffad31c,
invocation_hint=0xbffad22c, marshal_data=0x729cb00) at gmarshal.c:77
#5  0x01005f53 in IA__g_closure_invoke (closure=0x87cc230, return_value=0x0,
n_param_values=1, param_values=0xbffad31c, invocation_hint=0xbffad22c) at
gclosure.c:490
#6  0x010166a3 in signal_emit_unlocked_R (node=0x8653db0, detail=0,
instance=0x8654800, emission_return=0x0, instance_and_params=0xbffad31c) at
gsignal.c:2440
#7  0x01017bc7 in IA__g_signal_emit_valist (instance=0x8654800, signal_id=219,
detail=0, var_args=0xbffad55c "\021�\001\001�\022@") at gsignal.c:2199
#8  0x01017d89 in IA__g_signal_emit (instance=0x8654800, signal_id=219,
detail=0) at gsignal.c:2243
#9  0x07261814 in emfb_search_search_activated (esb=0x879e818, emfb=0x8654800)
at em-folder-browser.c:995
#10 0x010133a9 in IA__g_cclosure_marshal_VOID__VOID (closure=0x87b4608,
return_value=0x0, n_param_values=1, param_values=0xbffad7dc,
invocation_hint=0xbffad6ec, marshal_data=0x7261630) at gmarshal.c:77
#11 0x01005f53 in IA__g_closure_invoke (closure=0x87b4608, return_value=0x0,
n_param_values=1, param_values=0xbffad7dc, invocation_hint=0xbffad6ec) at
gclosure.c:490
#12 0x010166a3 in signal_emit_unlocked_R (node=0x8799978, detail=0,
instance=0x879e818, emission_return=0x0, instance_and_params=0xbffad7dc) at
gsignal.c:2440
#13 0x01017bc7 in IA__g_signal_emit_valist (instance=0x879e818, signal_id=341,
detail=0, var_args=0xbffada28 "") at gsignal.c:2199
#14 0x01019f4e in IA__g_signal_emit_by_name (instance=0x879e818,
detailed_signal=0x1260a4d "search_activated") at gsignal.c:2267
#15 0x0125fc73 in set_property (object=0x879e818, property_id=2,
value=0xbffadb74, pspec=0x87804c8) at e-filter-bar.c:829
#16 0x0100cc7e in IA__g_object_set_valist (object=0x879e818,
first_property_name=0x72d1d84 "state", var_args=<value optimized out>) at
gobject.c:697
#17 0x0100d116 in IA__g_object_set (_object=0x879e818,
first_property_name=0x72d1d84 "state") at gobject.c:1212
#18 0x07263a68 in emfb_set_folder (emfv=0x8654800, folder=0x84e0520,
uri=0x87c75a0 "mbox:/home/ralph/.evolution/mail/local#Inbox") at
em-folder-browser.c:1939
#19 0x0726fdd2 in emfv_got_folder (uri=0x87c75a0
"mbox:/home/ralph/.evolution/mail/local#Inbox", folder=0x84e0520,
data=0x8654800) at em-folder-view.c:699
#20 0x072a5756 in get_folder_done (m=0x23232323) at mail-ops.c:1198
#21 0x072a514e in mail_msg_idle_cb () at mail-mt.c:480
#22 0x056025b1 in g_idle_dispatch (source=0x861a748, callback=0x23232323,
user_data=0x0) at gmain.c:4132
#23 0x0560417c in IA__g_main_context_dispatch (context=0x849f530) at gmain.c:2061
#24 0x056075bf in g_main_context_iterate (context=0x849f530, block=1,
dispatch=1, self=0x847c6f0) at gmain.c:2694
#25 0x05607969 in IA__g_main_loop_run (loop=0x84c7b38) at gmain.c:2898
#26 0x007aa813 in bonobo_main () from /usr/lib/libbonobo-2.so.0
#27 0x0805e45c in main (argc=1, argv=0xbffae014) at main.c:601
#28 0x0630d0f0 in __libc_start_main () from /lib/libc.so.6
#29 0x0804f561 in _start ()
(gdb)