-=-=-=This is with the Undo Dialog open and I hit Ctrl+z=-=-=- ** (inkscape:20998): WARNING **: Incomplete undo transaction: ** (inkscape:20998): WARNING **: Event: Set attribute d to "m 331.38487,325.95415 c 3.73307,10.97571 5.75798,22.74112 5.75798,34.97947 0,58.49582 -46.26045,106.18693 -104.19276,108.48475 m -10.79683,-0.0999 C 165.17851,465.99705 120,418.74135 120,360.93362 120,300.97128 168.60908,252.3622 228.57143,252.3622 c 43.90479,0 81.72281,26.06058 98.82911,63.5568" on # -=-=-=This is with clicking the second to last undo item (Create and apply path effect)=-=-=- ** (inkscape:20998): WARNING **: Incomplete undo transaction: ** (inkscape:20998): WARNING **: Event: Set attribute d to "m 337.14285,360.93362 c 0,59.96235 -48.60908,108.57143 -108.57142,108.57143 C 168.60908,469.50505 120,420.89597 120,360.93362 120,300.97128 168.60908,252.3622 228.57143,252.3622 c 59.96234,0 108.57142,48.60908 108.57142,108.57142 z" on # ** (inkscape:20998): WARNING **: Event: Set attribute d to "m 437.14285,429.50505 c 0,59.96235 -48.60908,108.57143 -108.57142,108.57143 C 268.60908,538.07648 220,489.4674 220,429.50505 c 0,-59.96234 48.60908,-108.57142 108.57143,-108.57142 59.96234,0 108.57142,48.60908 108.57142,108.57142 z" on # ** (inkscape:20998): WARNING **: Event: Set attribute d to "m 331.38487,325.95415 c 3.73307,10.97571 5.75798,22.74112 5.75798,34.97947 0,59.96235 -48.60908,108.57143 -108.57142,108.57143 C 168.60908,469.50505 120,420.89597 120,360.93362 120,300.97128 168.60908,252.3622 228.57143,252.3622 c 43.90479,0 81.72281,26.06058 98.82911,63.5568" on # ** (inkscape:20998): WARNING **: Event: Set attribute d to "M 225.75798,464.48453 C 222.02491,453.50882 220,441.74341 220,429.50505 c 0,-59.96234 48.60908,-108.57142 108.57143,-108.57142 59.96234,0 108.57142,48.60908 108.57142,108.57142 0,59.96235 -48.60908,108.57143 -108.57142,108.57143 -43.9048,0 -81.72281,-26.06058 -98.82911,-63.5568" on # ** (inkscape:20998): WARNING **: Event: Set attribute d to "m 337.14285,360.93362 c 0,59.96235 -48.60908,108.57143 -108.57142,108.57143 C 168.60908,469.50505 120,420.89597 120,360.93362 120,300.97128 168.60908,252.3622 228.57143,252.3622 c 59.96234,0 108.57142,48.60908 108.57142,108.57142 z" on # ** (inkscape:20998): WARNING **: Event: Set attribute d to "m 437.14285,429.50505 c 0,59.96235 -48.60908,108.57143 -108.57142,108.57143 C 268.60908,538.07648 220,489.4674 220,429.50505 c 0,-59.96234 48.60908,-108.57142 108.57143,-108.57142 59.96234,0 108.57142,48.60908 108.57142,108.57142 z" on # ** (inkscape:20998): WARNING **: Event: Set attribute d to "m 331.38487,325.95415 c 3.73307,10.97571 5.75798,22.74112 5.75798,34.97947 0,59.96235 -48.60908,108.57143 -108.57142,108.57143 C 168.60908,469.50505 120,420.89597 120,360.93362 120,300.97128 168.60908,252.3622 228.57143,252.3622 c 43.90479,0 81.72281,26.06058 98.82911,63.5568" on # ** (inkscape:20998): WARNING **: Event: Set attribute d to "M 225.75798,464.48453 C 222.02491,453.50882 220,441.74341 220,429.50505 c 0,-59.96234 48.60908,-108.57142 108.57143,-108.57142 59.96234,0 108.57142,48.60908 108.57142,108.57142 0,59.96235 -48.60908,108.57143 -108.57142,108.57143 -43.9048,0 -81.72281,-26.06058 -98.82911,-63.5568" on # -=-=-=I believe this is where it crashed when I clicked back on Change knot crossing in the Undo History Dialog=-=-=- ** (inkscape:20998): CRITICAL **: virtual void Inkscape::EventLog::notifyRedoEvent(Inkscape::Event*): assertion `_getRedoEvent() && (*(_getRedoEvent()))[_columns.event] == log' failed ** (inkscape:20998): CRITICAL **: virtual void Inkscape::EventLog::notifyRedoEvent(Inkscape::Event*): assertion `_getRedoEvent() && (*(_getRedoEvent()))[_columns.event] == log' failed ** gtkmm:ERROR:treeiter.cc:214:const Gtk::TreeNodeChildren& Gtk::TreeRow::children() const: assertion failed: (!is_end_) Program received signal SIGABRT, Aborted. 0xb7fe0430 in __kernel_vsyscall () (gdb) bt #0 0xb7fe0430 in __kernel_vsyscall () #1 0xb64d24d1 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64 #2 0xb64d5932 in *__GI_abort () at abort.c:92 #3 0xb7140ddc in g_assertion_message () from /lib/libglib-2.0.so.0 #4 0xb714143d in g_assertion_message_expr () from /lib/libglib-2.0.so.0 #5 0xb7ebf36c in Gtk::TreeRow::children() const () from /usr/lib/libgtkmm-2.4.so.1 #6 0x08448712 in Inkscape::UI::Dialog::UndoHistory::_onListSelectionChange ( this=0xc175160) at ui/dialog/undo-history.cpp:278 #7 0xb7b3c1cb in Glib::SignalProxyNormal::slot0_void_callback(_GObject*, void*) () from /usr/lib/libglibmm-2.4.so.1 #8 0xb71d394c in g_cclosure_marshal_VOID__VOID () from /usr/lib/libgobject-2.0.so.0 #9 0xb71c6092 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0 #10 0xb71dbcb6 in ?? () from /usr/lib/libgobject-2.0.so.0 #11 0xb71dca7d in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0 #12 0xb71dcf06 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0 #13 0xb7760083 in ?? () from /usr/lib/libgtk-x11-2.0.so.0 #14 0xb7778b93 in ?? () from /usr/lib/libgtk-x11-2.0.so.0 #15 0xb77826e6 in ?? () from /usr/lib/libgtk-x11-2.0.so.0 #16 0xb7ee0f71 in Gtk::Widget_Class::button_press_event_callback(_GtkWidget*, _GdkEventButton*) () from /usr/lib/libgtkmm-2.4.so.1 #17 0xb7677404 in ?? () from /usr/lib/libgtk-x11-2.0.so.0 #18 0xb71c4719 in ?? () from /usr/lib/libgobject-2.0.so.0 #19 0xb71c6092 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0 #20 0xb71db3ee in ?? () from /usr/lib/libgobject-2.0.so.0 #21 0xb71dc908 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0 #22 0xb71dcf06 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0 #23 0xb779387e in ?? () from /usr/lib/libgtk-x11-2.0.so.0 #24 0xb766fbb0 in gtk_propagate_event () from /usr/lib/libgtk-x11-2.0.so.0 #25 0xb7670e39 in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0 #26 0xb74eb64a in ?? () from /usr/lib/libgdk-x11-2.0.so.0 #27 0xb7119e78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0 #28 0xb711d720 in ?? () from /lib/libglib-2.0.so.0 #29 0xb711db8f in g_main_loop_run () from /lib/libglib-2.0.so.0 #30 0xb76713a9 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0 #31 0xb7e55577 in Gtk::Main::run_impl() () from /usr/lib/libgtkmm-2.4.so.1 #32 0xb7e55372 in Gtk::Main::run() () from /usr/lib/libgtkmm-2.4.so.1 #33 0x08088d6b in sp_main_gui (argc=1, argv=0xbffff494) at main.cpp:949 #34 0x08164dda in Inkscape::NSApplication::Application::run (this=0xbffff3b8) at application/application.cpp:114 #35 0x080881f2 in main (argc=1, argv=0xbffff494) at main.cpp:685