Open EFM /home/$USER/, Open [Settings Panel]->[Files]->[File Manager]->[TAB: Display]. if you select/unselect "File Extensions" and/or "Sidebar" E17 will segf.
Thread 1 (Thread 0xb6291770 (LWP 26993)): #0 0xb773f424 in __kernel_vsyscall () No symbol table info available. #1 0xb72eecc1 in pause () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0 No symbol table info available. #2 0x0807b28e in e_alert_show () at e_alert.c:38 No locals. #3 0x081611af in e_sigseg_act (x=11, info=0xbfc5d5ac, data=0xbfc5d62c) at e_signals.c:71 No locals. #4 <signal handler called> No symbol table info available. #5 0x0816cbe5 in _e_toolbar_fm2_changed (data=0xa114e10, obj=0xa2bc5c0, event_info=0x0) at e_toolbar.c:383 tbar = 0xa114e10 l = 0x0 gcc = 0x0 #6 0xb73c8340 in evas_object_smart_callback_call () from /usr/lib/i386-linux-gnu/libevas.so.1 No symbol table info available. #7 0x080dd2db in _e_fm2_queue_process (obj=0xa2bc5c0) at e_fm.c:3783 sd = 0xa2bf110 ic = 0xa157008 ic2 = 0x0 l = 0x0 ll = 0x0 added = 426 i = 0 p0 = 0 p1 = 0 n = 0 v = 0 t = 5095.4086005409999 buf = "426 files", '\000' <repeats 1899 times>"\320, \301\215\n`&\317\t\364\257G\267\334C;\267\370\344\302\t@\342Å¿", '\000' <repeats 20 times>, "tI(\267", '\000' <repeats 12 times>"\260, \322\061\267", '\000' <repeats 24 times>"\330, \026\313\n", '\000' <repeats 32 times>"\364, o*\267 \336\310\t@\342Å¿ \336\310\tB\324'\267\320\301\215\n\200\030\213\t@\342Å¿", '\000' <repeats 36 times>, "\002\000\000\000\000\000\000\000\330\026\313\n\324\337\310\t", '\000' <repeats 12 times>, "\177\f\177\003edje/images/14", '\000' <repeats 174 times>, "$U&\267", '\000' <repeats 16 times>, "pË\n\240R:\n\364\257G\267\334C;\267\220c\232\t\360\343Å¿\000\000\000\000\323\035\062\267\207\221.\267\000\000\000\000\371\244.\267tI(\267\000\000\000\000\000\000\000\000qi\000\000\260"... #8 0x080e9a59 in _e_fm2_cb_scan_timer (data=0xa2bc5c0) at e_fm.c:8222 sd = 0xa2bf110 #9 0xb736a304 in _ecore_call_task_cb (func=0x80e9a2a <_e_fm2_cb_scan_timer>, data=0xa2bc5c0) at ecore_private.h:267 r = 64 '@' #10 0xb736b301 in _ecore_timer_expired_call (when=5095.408591286) at ecore_timer.c:792 timer = 0x9961b50 #11 0xb736b1a8 in _ecore_timer_expired_timers_call (when=5095.408591286) at ecore_timer.c:746 No locals. #12 0xb73686b9 in _ecore_main_loop_iterate_internal (once_only=0) at ecore_main.c:1813 next_time = -1 #13 0xb7366b21 in ecore_main_loop_begin () at ecore_main.c:956 No locals. #14 0x08077c00 in main (argc=1, argv=0xbfc5fcd4) at e_main.c:1061 nostartup = 0 '\000' safe_mode = 0 '\000' after_restart = 1 '\001' waslocked = 0 '\000' t = 1355776368.1617801 tstart = 1355776368.1617801 s = 0x0 buff = "1355776368.2\000\353Å¿\004\373Å¿\000\000\000\000\364\317u\267@\324t\267" action = {__sigaction_handler = { sa_handler = 0x8161234 <e_sigabrt_act>, sa_sigaction = 0x8161234 <e_sigabrt_act>}, sa_mask = {__val = { 0 <repeats 32 times>}}, sa_flags = -1073741820, sa_restorer = 0xb775cff4} __FUNCTION__ = "main" Detaching from program: /usr/bin/enlightenment, process 26993