nemiver gives me this backtrace: #0 Gtk::TreeViewColumn::set_title () at :0 #1 ?? () at :0 #2 ?? () at :0 #3 ?? () at :0 #4 operator delete () at :0 #5 gcs::Widgets::BookmarkList::load_project (this=(class gcs::Widgets::BookmarkList * const) 0x81d0518, project=) at gcs-bookmarklist.cc:140 #6 BookmarkList (this=(class gcs::Widgets::BookmarkList * const) 0x81d0518, proj_mgr=) at gcs-bookmarklist.cc:58 #7 MainWindow (this=(class gcs::MainWindow * const) 0x8180200, cobject=(GtkWindow *) 0x8122000, refGlade=) at gcs-mainwindow.cc:103 #8 Gnome::Glade::Xml::get_widget_derived (this=(struct Gnome::Glade::Xml * const) 0x81183b8, name=, widget=(class gcs::MainWindow *&) @0x80cf808: 0x0) at /usr/include/libglademm-2.4/libglademm/xml.h:265 #9 gcs::MainWindow::Instance () at gcs-mainwindow.cc:71 #10 main (argc=1, argv=(char **) 0xbfe07c14) at main.cc:101 gdb gives me this backtrace: 0xb73e2ad9 in Gtk::TreeViewColumn::set_title () from /usr/lib/libgtkmm-2.4.so.1 (gdb) bt #0 0xb73e2ad9 in Gtk::TreeViewColumn::set_title () from /usr/lib/libgtkmm-2.4.so.1 #1 0xbff06dcc in ?? () #2 0x081802ac in ?? () #3 0x00000000 in ?? ()