OS Info: Linux 3.13.0-35-generic Ubuntu x86_64
Linux DEBUG, cpu: AMD64, version: 2.6-dev

Here's the error and the resultant backtrace:

...
UI_ParseNode: node behaviour/component 'checkbox_ui2' doesn't exist (buildings)
UI_ParseWindow: window "buildings" has a bad body

Cmd_RemoveCommand: mn_init_keylist not added
Cmd_RemoveCommand: mn_mods not added
FS_RemoveFile: remove /home/paul/.ufoai/2.6-dev/base/keys.cfg
[Thread 0x7fffe2747700 (LWP 5327) exited]
There are still 1 opened files

Program received signal SIGTRAP, Trace/breakpoint trap.
0x00007ffff5e3f20b in raise (sig=5)
at ../nptl/sysdeps/unix/sysv/linux/pt-raise.c:37
37 ../nptl/sysdeps/unix/sysv/linux/pt-raise.c: No such file or directory.


0x00007ffff5e3f20b in raise (sig=5)
at ../nptl/sysdeps/unix/sysv/linux/pt-raise.c:37
resultvar = 0
pid = <optimised out>
#1 0x00000000005cc74b in Sys_Breakpoint ()
at src/ports/unix/unix_shared.cpp:86
No locals.
#2 0x00000000004def16 in Com_BreakIntoDebugger () at src/common/common.cpp:501
data = {flags = 16, window = 0x0, title = 0x675bf0 "Error",
message = 0x675bf6 "Break into the debugger?", numbuttons = 2,
buttons = 0x7fffffffd230, colorScheme = 0x0}
okButton = {flags = 1, buttonid = 1, text = 0x675be9 "Yes"}
cancelButton = {flags = 2, buttonid = 2, text = 0x675bed "No"}
buttons = {{flags = 1, buttonid = 1, text = 0x675be9 "Yes"}, {
flags = 2, buttonid = 2, text = 0x675bed "No"}}
buttonid = 1
#3 0x00000000005ccfe6 in Sys_Backtrace () at src/ports/unix/unix_main.cpp:239
dumpFile = 0x7fffffffd480 "\260\324\377\377\377\177"
file = 0x7fffffffd480
crash = 0x7fffffffd480
info = {
sysname = "\001\000\000\000\000\000\000\000\030h\254\001\000\000\000\000\244\000\000\000\000\000\000\000\245\000\000\000\000\000\000\000\260\324\377\377\377\177\000\000-q\270\356\377\177\000\000\320\325\377\377l\000\000\000\216\205\270\356\243\000\000\000\030",
nodename = "h\254\001\000\000\000\000\243\000\000\000\000\000\000\000\240\203\265\001\000\000\000\000\002\000\000\000\n\000\000\000\003\326\377\377\377\177\000\000\377\377\377\377\000\000\000\000\320\325\377\377\377\177\000\000\030h\254\001\000\000\000\000\244",
release = "\000\000\000\000\000\000@\326\377\377\377\177\000\000\240\203\265\001\000\000\000\000g\000\000\000\000\000\000\000P\327\377\377\377\177\000\000\222v\270\356\377\177\000\000@\326\377\377\377\177\000\000\320\325\377\377\377\177\000\000\000\000",
version = "\000\000\000\000\000\360\325\377\377\377\177\000\000v\000\000\000\000\000\000\000\000\032\225\272f\325\365d \326\377\377\377\177\000\000g\000\000\000\000\000\000\000\360\325\377\377\377\177\000\000P\327\377\377\377\177\000\000\360\325\377\377",
machine = "\377\177\000\000 \326\377\377\377\177\000\000g\000\000\000\000\000\000\000\035T\267\356\377\177\000\000\360\325\377\377\377\177\000\000\a\000\000\000\000\000\000\000\232\000\000\000\000\000\000\000\t.\267\356\377\177\000\000\330\327\377\377\377",
domainname = "\177\000\000\020\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\030h\254\001\000\000\000\000P\204\270\356\377\177\000\000\300\325\377\377\377\177\000\000\001\000\000\000\247\000\000\000\250\000\000\000\000"}
symbols = {0x7fffffffd480, 0x7fffffffd490, 0x7fffffffd87f,
0x7fffffffd480, 0x7fffffffd87f, 0x0, 0x0, 0x0, 0x0, 0x0, 0xf4e35f70,
0x7ffff7fc64e8, 0x7fffffff0000, 0x0, 0x40a040 <_start>,
0x7fffffffde10, 0x0, 0x0, 0x7fffffffd950,
0x7ffff4e7c2e7 <__fprintf+135>, 0xffffffff, 0x3000000018,
0x7fffffffd450, 0x10, 0x0, 0x7fffffffde10, 0x7fffffffd480,
0x1001000000000000, 0x0, 0x18, 0x3000000005, 0x0, 0xffffda10, 0x10,
0x0, 0x7fffffffd440, 0x40a040 <_start>, 0x7fffffffde10, 0x2, 0x1,
0x1ac6818, 0x7fffeeb88450, 0x1, 0xa500000001, 0x2, 0x1ac6818,
0x7fffffffd4b0, 0x7fffeeb8858e, 0x1ac6818, 0xa5000000a4}
i = 0
#4 0x00000000005ccae0 in Sys_Error (error=0x675be0 "Shutdown")
at src/ports/unix/unix_main.cpp:83
argptr = {{gp_offset = 28076056, fp_offset = 0,
overflow_arg_area = 0x20, reg_save_area = 0x20}}
string = "$ \253\001\000\000\000\000\312\067\253\360\377\177\000\000P\327\377\377\377\177\000\000)\211\270\356\377\177\000\000\030h\254\001\000\000\000\000`w\036\365\377\177\000\000\020\000\000\000\000\000\000\000 \000\000\000\000\000\000\000\260\037\253\001\000\000\000\000\200j\254\001", '\000' <repeats 12 times>, "\060\262\352\364\377\177\000\000\260\037\253\001", '\000' <repeats 12 times>, "\001\000\000\000\000\000\000\000\374;\253\360\377\177\000\000\000\000\000\000\000\000\000\000 \000\000\000\000\000\000\000p0\253\001\000\000\000\000\000\000\000\000\001\000\000\000@0\253\001\000\000\000\000\060\000\000\000\000\000\000\000$ \253\001\000\000\000\000\000\020", '\000' <repeats 14 times>...
#5 0x00000000004dedfa in Com_Error (code=0,
fmt=0x65c5e8 "UI_ParseWindow: window \"%s\" has a bad body\n")
at src/common/common.cpp:461
argptr = {{gp_offset = 24, fp_offset = 48,
overflow_arg_area = 0x7fffffffdbf0,
reg_save_area = 0x7fffffffdb30}}
msg = "UI_ParseWindow: window \"buildings\" has a bad body\n", '\000' <repeats 4045 times>
recursive = true
#6 0x00000000004666f8 in UI_ParseWindow (
type=0x16a75e0 <FS_NextScriptHeader(char const*, char const**, char const**)::headerType> "window",
name=0x16a7620 <FS_NextScriptHeader(char const*, char const**, char const**)::headerName> "buildings", text=0x7fffffffdcb0)
at src/client/ui/ui_parse.cpp:1396
errhead = 0x65c430 "UI_ParseWindow: unexpected end of file (window"
window = 0x239d260
token = 0x186eaa0 <com_token> "checkbox_ui2"
i = 13
result = false
#7 0x0000000000416d45 in CL_ParseClientData (
type=0x16a75e0 <FS_NextScriptHeader(char const*, char const**, char const**)::headerType> "window",
name=0x16a7620 <FS_NextScriptHeader(char const*, char const**, char const**)::headerName> "buildings", text=0x7fffffffdcb0) at src/client/cl_main.cpp:782
progressCurrent = 1529
#8 0x00000000004fe06a in Com_ParseScripts (onlyServer=false)
at src/common/scripts.cpp:3673
type = 0x16a75e0 <FS_NextScriptHeader(char const*, char const**, char const**)::headerType> "window"
name = 0x16a7620 <FS_NextScriptHeader(char const*, char const**, char const**)::headerName> "buildings"
text = 0x29ec5a5 " building_preview\n\t{\n\t\ttooltip\t\t\"_Open/close Building preview window\"\n\t\tpos\t\t\t\"770 700\"\n\t\tsize\t\t\"20 20\"\n\t\tcurrent\t\t1\n\t\tonChange\t{\n\t\t\tif ( *node:root.building_preview@current == 0 ) {\n\t\t\t\tcmd \"ui_close"...
#9 0x00000000004e0833 in Qcommon_Init (argc=10, argv=0x7fffffffde18)
at src/common/common.cpp:1230
hwclassVal = 0x676426 "5"
s = 0x1870ae0 <va(char const*, ...)::string+4096> "pics/ui/base_lr_sm"
com_pipefile = 0xf00000000
#10 0x00000000005cafc9 in main (argc=10, argv=0x7fffffffde18)
at src/ports/linux/linux_main.cpp:50
No locals.