I decided to try again the table of contents (which was always disabled), and now it crashes LyX with file Intro.lyx.
Backtrace follows. If I look at frame 2, lfun_name_ is not initialized correctly: (gdb) frame 2 #2 0x08b0ee5f in lyx::frontend::ControlCommand::initialiseParams ( this=0x93489f0, [EMAIL PROTECTED]) at ../../../../lyx-devel/src/frontends/controllers/ControlCommand.C:35 35 InsetCommandMailer::string2params(lfun_name_, data, params_); (gdb) p lfun_name_ $4 = {static npos = 4294967295, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}} JMarc Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1221152096 (LWP 25504)] operator!=<char, std::char_traits<char>, std::allocator<char> > ( [EMAIL PROTECTED], [EMAIL PROTECTED]) at basic_string.h:265 265 { return &((reinterpret_cast<_Rep*> (_M_data()))[-1]); } (gdb) bt #0 operator!=<char, std::char_traits<char>, std::allocator<char> > ( [EMAIL PROTECTED], [EMAIL PROTECTED]) at basic_string.h:265 #1 0x0875aab7 in lyx::InsetCommandMailer::string2params ([EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED]) at ../../../lyx-devel/src/insets/insetcommand.C:201 #2 0x08b0ee5f in lyx::frontend::ControlCommand::initialiseParams ( this=0x93489f0, [EMAIL PROTECTED]) at ../../../../lyx-devel/src/frontends/controllers/ControlCommand.C:35 #3 0x08b56934 in lyx::frontend::ControlToc::initialiseParams (this=0x9343218, [EMAIL PROTECTED]) at ../../../../lyx-devel/src/frontends/controllers/ControlToc.C:54 #4 0x08a79e25 in lyx::frontend::Dialog::show (this=0x93450a0, [EMAIL PROTECTED]) at ../../../../lyx-devel/src/frontends/controllers/Dialog.C:80 #5 0x088759b0 in lyx::Dialogs::show (this=0x9093ff8, [EMAIL PROTECTED], [EMAIL PROTECTED], inset=0x93489f0) at ../../../lyx-devel/src/frontends/Dialogs.C:118 #6 0x0841a10a in lyx::LyXFunc::dispatch (this=0x8fbb460, [EMAIL PROTECTED]) at LyXView.h:139 #7 0x083ebeb9 in lyx::dispatch ([EMAIL PROTECTED]) at ../../lyx-devel/src/lyx_main.C:1451 #8 0x08889fd4 in lyx::LyXView::dispatch (this=0x90939ac, [EMAIL PROTECTED]) at ../../../lyx-devel/src/frontends/LyXView.C:441 #