Hi,
When I save a document in LyX 1.2.0, that contains math environment, that will crash LyX 1.3.0 after loading that document. I created a minimized document; File->New, then one character in math enviroment. Here is the gdb-backtrace: $ gdb src/lyx GNU gdb 4.18 Copyright 1998 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-unknown-freebsd"... (gdb) run Starting program: /home/lahaye/SOFTWARE/lyx-devel/src/lyx Tokens: [$,3][a,11][$,3] something strange in the parser Program received signal SIGSEGV, Segmentation fault. 0x80cc157 in BufferList::readFile (this=0x8519314, s=@0xbfbfe7e8, ronly=false) at bufferlist.C:432 432 } (gdb) bt #0 0x80cc157 in BufferList::readFile (this=0x8519314, s=@0xbfbfe7e8, ronly=false) at bufferlist.C:432 #1 0x80cd667 in BufferList::loadLyXFile (this=0x8519314, filename=@0xbfbfec98, tolastfiles=true) at bufferlist.C:535 #2 0x8124956 in LyXFunc::open (this=0x854e680, fname=@0xbfbff644) at lyxfunc.C:1902 #3 0x811a2cc in LyXFunc::dispatch (this=0xbfbff644, action=LFUN_FILE_OPEN, argument=0xbfbff644) at lyxfunc.C:1345 #4 0x8115460 in LyXFunc::verboseDispatch (this=0x854e680, action=LFUN_FILE_OPEN, argument=@0xbfbff698, show_sc=true) at lyxfunc.C:802 #5 0x81153af in LyXFunc::verboseDispatch (this=0x854e680, ac=165, show_sc=true) at lyxfunc.C:794 #6 0x8302c05 in Menubar::Pimpl::MenuCallback (ob=0x85a8d00, button=1) at Menubar_pimpl.C:588 #7 0x82f8db0 in C_Menubar_Pimpl_MenuCallback (ob=0x85a8d00, button=1) at Menubar_pimpl.C:82 #8 0x28550daf in fl_object_qread () from /usr/X11R6/lib/libforms.so.0.88 #9 0x2855e279 in fl_check_forms () from /usr/X11R6/lib/libforms.so.0.88 #10 0x82f7b4d in GUIRunTime::runTime () at GUIRunTime.C:87 #11 0x8101154 in LyXGUI::runTime (this=0x85400c0) at lyx_gui.C:292 #12 0x8101f81 in LyX::LyX (this=0xbfbffa40, argc=0xbfbffa78, argv=0xbfbffac4) at ../src/lyx_main.C:177 #13 0x814d2de in main (argc=1, argv=0xbfbffac4) at ../src/main.C:38 #14 0x8050c35 in _start () Any ideas? Rob.