When you run a headless server and have set DebugMode=true in glestuser.ini, this will cause a segmentation fault because OpenGL events cannot be tracked.
[2011-11-30 05:47:19] Runtime Error information:
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In [/home/softcoder/Code/megaglest/trunk/source/glest_game/main/main.cpp::handleSIGSEGV Line: 645] Error detected: signal 11:
Stack Trace:
./megaglest:Glest::Game::handleSIGSEGV(int) address [0x6bdc02] line: 0
/lib/libc.so.6:() address [0x7f86122081e0] line: 0
./megaglest:Glest::Game::Renderer::getCurrentPixelByteCount(Shared::Graphics::ResourceScope) const address [0x66747b] line: 0
./megaglest:Glest::Game::Game::init(bool) address [0x614dc9] line: 0
./megaglest:Glest::Game::Program::setState(Glest::Game::ProgramState*, bool) address [0x6d7386] line: 0
./megaglest:Glest::Game::MenuStateCustomGame::PlayNow(bool) address [0x7b1ef6] line: 0
./megaglest:Glest::Game::MenuStateCustomGame::update() address [0x7b501b] line: 0
./megaglest:Glest::Game::Program::loopWorker() address [0x6d7f01] line: 0
./megaglest:Glest::Game::glestMain(int, char**) address [0x6cfb52] line: 0
./megaglest:Glest::Game::glestMainWrapper(int, char**) address [0x6d1f23] line: 0
/lib/libc.so.6:__libc_start_main() address [0x7f86121f4c4d] line: 0
./megaglest() [0x5b5ba9] address [0x5b5ba9] line: 0
This is fixed in SVN and will thus be fixed in the next beta/release.