The first time I ran fs2_open in Linux it segfaulted.
The simple fix was to move the binary into the data directory.
Firing up the debugger, it was crashing in the Error function.

I tracked it down to some inverted parameters on the call to the error
function.  I also noticed a couple other things:
   + memset( &buffer ,... is clobbering the static variables, rather
   than clearing the buffer.
   + char * -> const char * on the Error and Warning functions to be
   type friendly to vnsprintf
Index: code/globalincs/pstypes.h
===================================================================
RCS file: /home/fs2source/cvsroot/fs2_open/code/globalincs/pstypes.h,v
retrieving revision 2.54
diff -u -r2.54 pstypes.h
--- code/globalincs/pstypes.h	22 Mar 2007 22:19:31 -0000	2.54
+++ code/globalincs/pstypes.h	23 Aug 2007 05:33:46 -0000
@@ -606,8 +606,8 @@
 //This are defined in MainWin.c
 extern void _cdecl WinAssert(char * text,char *filename, int line);
 extern void LuaError(struct lua_State *L, char *format=NULL, ...);
-extern void _cdecl Error( char * filename, int line, char * format, ... );
-extern void _cdecl Warning( char * filename, int line, char * format, ... );
+extern void _cdecl Error( char * filename, int line, const char * format, ... );
+extern void _cdecl Warning( char * filename, int line, const char * format, ... );
 
 #include "osapi/outwnd.h"
 
Index: code/weapon/weapons.cpp
===================================================================
RCS file: /home/fs2source/cvsroot/fs2_open/code/weapon/weapons.cpp,v
retrieving revision 2.208
diff -u -r2.208 weapons.cpp
--- code/weapon/weapons.cpp	16 Aug 2007 00:45:54 -0000	2.208
+++ code/weapon/weapons.cpp	23 Aug 2007 05:33:47 -0000
@@ -3880,7 +3880,7 @@
 
 		// parse weapons.tbl
 		if ((rval = setjmp(parse_abort)) != 0) {
-			Error(LOCATION, "Error parsing '%s'\r\nError code = %i.\r\n", rval, current_weapon_table);
+			Error(LOCATION, "Error parsing '%s'\r\nError code = %i.\r\n", current_weapon_table, rval);
 		} else {	
 			weapon_reset_info();
 
Index: code/windows_stub/stubs.cpp
===================================================================
RCS file: /home/fs2source/cvsroot/fs2_open/code/windows_stub/stubs.cpp,v
retrieving revision 2.35
diff -u -r2.35 stubs.cpp
--- code/windows_stub/stubs.cpp	22 Mar 2007 22:14:57 -0000	2.35
+++ code/windows_stub/stubs.cpp	23 Aug 2007 05:33:47 -0000
@@ -208,15 +208,15 @@
 }
 
 // standard warning message
-void Warning( char * filename, int line, char * format, ... )
+void Warning( char * filename, int line, const char * format, ... )
 {
 #ifndef NDEBUG
 	va_list args;
 	int i;
 	int slen = 0;
 
-	memset( &buffer, 0, sizeof(buffer) );
-	memset( &buffer_tmp, 0, sizeof(buffer_tmp) );
+	memset( buffer, 0, sizeof(buffer) );
+	memset( buffer_tmp, 0, sizeof(buffer_tmp) );
 
 	va_start(args, format);
 	vsnprintf(buffer_tmp, sizeof(buffer_tmp) - 1, format, args);
@@ -247,14 +247,14 @@
 }
 
 // fatal error message
-void Error( char * filename, int line, char * format, ... )
+void Error( char * filename, int line, const char * format, ... )
 {
-	va_list args;
 	int i;
 	int slen = 0;
+	va_list args;
 
-	memset( &buffer, 0, sizeof(buffer) );
-	memset( &buffer_tmp, 0, sizeof(buffer_tmp) );
+	memset( buffer, 0, sizeof(buffer) );
+	memset( buffer_tmp, 0, sizeof(buffer_tmp) );
 
 	va_start(args, format);
 	vsnprintf(buffer_tmp, sizeof(buffer_tmp) - 1, format, args);