The same (?) thing happened again today:
v3.5.2-GNUC: 40401 [64bit]-May 26 2011 09:59:59, SVN: [Rev: 2305], [STREFLOP]
megaglest: /home/softcoder/Code/megaglest/trunk/source/glest_game/facilities/components.cpp:318: void Glest::Game::GraphicListBox::setSelectedItemIndex(int, bool): Assertion `index>=0 && index<items.size()' failed.
Aborted (core dumped)
Core was generated by `./megaglest'.
Program terminated with signal 6, Aborted.
#0 0x00007fc6af293d05 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
64 ../nptl/sysdeps/unix/sysv/linux/raise.c: Datei oder Verzeichnis nicht gefunden.
in ../nptl/sysdeps/unix/sysv/linux/raise.c
#0 0x00007fc6af293d05 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1 0x00007fc6af297ab6 in abort () at abort.c:92
#2 0x00007fc6af28c7c5 in __assert_fail (assertion=0xa96af8 "index>=0 && index<items.size()", file=<value optimized out>, line=318, function=<value optimized out>) at assert.c:81
#3 0x00000000005bbe86 in Glest::Game::GraphicListBox::setSelectedItemIndex (this=0x20de8d8, index=<value optimized out>, errorOnMissing=<value optimized out>) at /home/softcoder/Code/megaglest/trunk/source/glest_game/facilities/components.cpp:318
#4 0x00000000007057d7 in Glest::Game::MenuStateCustomGame::setupUIFromGameSettings (this=0x20dd800, gameSettings=...) at /home/softcoder/Code/megaglest/trunk/source/glest_game/menu/menu_state_custom_game.cpp:2580
#5 0x000000000071b906 in Glest::Game::MenuStateCustomGame::loadGameSettingsFromFile (this=<value optimized out>, fileName=<value optimized out>) at /home/softcoder/Code/megaglest/trunk/source/glest_game/menu/menu_state_custom_game.cpp:2503
#6 0x000000000071c67f in Glest::Game::MenuStateCustomGame::RestoreLastGameSettings (this=0x20dd800) at /home/softcoder/Code/megaglest/trunk/source/glest_game/menu/menu_state_custom_game.cpp:1072
#7 0x000000000071fde3 in Glest::Game::MenuStateCustomGame::mouseClick (this=0x20dd800, x=448, y=192, mouseButton=<value optimized out>) at /home/softcoder/Code/megaglest/trunk/source/glest_game/menu/menu_state_custom_game.cpp:699
#8 0x0000000000641555 in Glest::Game::MainWindow::eventMouseDown (this=0x1723b00, x=<value optimized out>, y=<value optimized out>, mouseButton=Shared::Platform::mbLeft) at /home/softcoder/Code/megaglest/trunk/source/glest_game/main/main.cpp:628
#9 0x00000000008a7c18 in Shared::Platform::Window::handleMouseDown (this=0x1723b00, event=...) at /home/softcoder/Code/megaglest/trunk/source/shared_lib/sources/platform/sdl/window.cpp:548
#10 0x00000000008a8172 in Shared::Platform::Window::handleEvent () at /home/softcoder/Code/megaglest/trunk/source/shared_lib/sources/platform/sdl/window.cpp:130
#11 0x0000000000654619 in Glest::Game::glestMain (argc=<value optimized out>, argv=<value optimized out>) at /home/softcoder/Code/megaglest/trunk/source/glest_game/main/main.cpp:2994
#12 0x0000000000655c14 in Glest::Game::glestMainWrapper (argc=1, argv=0x7fffb201e668) at /home/softcoder/Code/megaglest/trunk/source/glest_game/main/main.cpp:3079
#13 0x00007fc6af27eeff in __libc_start_main (main=0x655cd0 <main(int, char**)>, argc=1, ubp_av=0x7fffb201e668, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fffb201e658) at libc-start.c:226
#14 0x0000000000574429 in _start () at ../sysdeps/x86_64/elf/start.S:113
$ cat .megaglest/lastCustomGamSettings.mgg
Description=Valley Of Death
MapFilterIndex=2
Map=valley_of_death
Tileset=karningul
TechTree=megapack
DefaultUnits=1
DefaultResources=1
DefaultVictoryConditions=1
FogOfWar=1
AdvancedIndex=0
AllowObservers=0
FlagTypes1=0
EnableObserverModeAtEndGame=1
PathFinderType=0
EnableServerControlledAI=1
NetworkFramePeriod=20
NetworkPauseGameForLaggedClients=1
FactionThisFactionIndex=0
FactionCount=1
FactionControlForIndex0=7
ResourceMultiplierIndex0=5
FactionTeamForIndex0=0
FactionStartLocationForIndex0=0
FactionTypeNameForIndex0=magic
FactionPlayerNameForIndex0=tomreyn
FactionControlForIndex1=0
ResourceMultiplierIndex1=10
FactionTeamForIndex1=1
FactionStartLocationForIndex1=1
FactionTypeNameForIndex1=indian
FactionPlayerNameForIndex1=Closed
FactionControlForIndex2=0
ResourceMultiplierIndex2=10
FactionTeamForIndex2=2
FactionStartLocationForIndex2=2
FactionTypeNameForIndex2=magic
FactionPlayerNameForIndex2=Closed
FactionControlForIndex3=0
ResourceMultiplierIndex3=10
FactionTeamForIndex3=3
FactionStartLocationForIndex3=3
FactionTypeNameForIndex3=norsemen
FactionPlayerNameForIndex3=Closed
FactionControlForIndex4=0
ResourceMultiplierIndex4=10
FactionTeamForIndex4=4
FactionStartLocationForIndex4=4
FactionTypeNameForIndex4=persian
FactionPlayerNameForIndex4=Closed
FactionControlForIndex5=0
ResourceMultiplierIndex5=10
FactionTeamForIndex5=5
FactionStartLocationForIndex5=5
FactionTypeNameForIndex5=romans
FactionPlayerNameForIndex5=Closed
FactionControlForIndex6=0
ResourceMultiplierIndex6=10
FactionTeamForIndex6=6
FactionStartLocationForIndex6=6
FactionTypeNameForIndex6=tech
FactionPlayerNameForIndex6=Closed
FactionControlForIndex7=0
ResourceMultiplierIndex7=10
FactionTeamForIndex7=7
FactionStartLocationForIndex7=7
FactionTypeNameForIndex7=*Random*
FactionPlayerNameForIndex7=Closed