i was editing the conditions of a generic action and then changed into the 
general tab ... boom: 
 
[KCrash handler] 
#5  0x00000030 in ?? () 
#6  0x3c42a66b in QPtrList<KHotKeys::Condition>::deleteItem (this=0x81e90c8,  
    d=0x827ac68) at qptrlist.h:150 
#7  0x3ba9c387 in QGList::clear (this=0x81e90c8) at tools/qglist.cpp:701 
#8  0x3c42a499 in QPtrList<KHotKeys::Condition>::clear (this=0x81e90c8) 
    at qptrlist.h:93 
#9  0x3c443258 in KHotKeys::Condition_list_widget::clear_data (this=0x81e9010) 
    at khotkeys/kcontrol/condition_list_widget.cpp:88 
#10 0x3c444cde in KHotKeys::Condition_list_widget::qt_invoke (this=0x81e9010,  
    _id=50, _o=0xafffe340) at condition_list_widget.moc:98 
#11 0x3b7982a9 in QObject::activate_signal (this=0x8299ea8, clist=0x8276930,  
    o=0xafffe340) at kernel/qobject.cpp:2381 
#12 0x3b79800f in QObject::activate_signal (this=0x8299ea8, signal=4) 
    at kernel/qobject.cpp:2326 
#13 0x3c42de20 in KHotKeys::Tab_widget::clear_pages_signal (this=0x8299ea8) 
    at tab_widget.moc:89 
#14 0x3c42e31f in KHotKeys::Tab_widget::clear_pages (this=0x8299ea8) 
    at tab_widget.h:92 
#15 0x3c42d9be in KHotKeys::Tab_widget::show_pages (this=0x8299ea8,  
    pages_P=@0xafffe3f0) at khotkeys/kcontrol/tab_widget.cpp:431 
#16 0x3c42d795 in KHotKeys::Tab_widget::set_action_type (this=0x8299ea8,  
    type_P=TYPE_MENUENTRY_SHORTCUT, force_P=false) 
    at khotkeys/kcontrol/tab_widget.cpp:378 
#17 0x3c42d904 in KHotKeys::Tab_widget::set_action_type_slot (this=0x8299ea8,  
    type_P=2) at khotkeys/kcontrol/tab_widget.cpp:399 
#18 0x3c42de7b in KHotKeys::Tab_widget::qt_invoke (this=0x8299ea8, _id=49,  
    _o=0xafffe4e0) at tab_widget.moc:95 
#19 0x3b79816f in QObject::activate_signal (this=0x82d5198, clist=0x823b760,  
    o=0xafffe4e0) at kernel/qobject.cpp:2357 
#20 0x3b7984c4 in QObject::activate_signal (this=0x82d5198, signal=2, param=2) 
    at kernel/qobject.cpp:2450 
#21 0x3c431e75 in KHotKeys::General_tab::action_type_changed (this=0x82d5198,  
    t0=2) at general_tab.moc:94 
#22 0x3c431f87 in KHotKeys::General_tab::qt_emit (this=0x82d5198, _id=2,  
    _o=0xafffe5e0) at general_tab.moc:111 
#23 0x3b79827d in QObject::activate_signal (this=0x82452b0, clist=0x8231840,  
    o=0xafffe5e0) at kernel/qobject.cpp:2379 
#24 0x3b7984c4 in QObject::activate_signal (this=0x82452b0, signal=2, param=2) 
    at kernel/qobject.cpp:2450 
#25 0x3bb2ea9f in QComboBox::activated (this=0x82452b0, t0=2) 
    at .moc/debug-shared-mt/moc_qcombobox.cpp:161 
#26 0x3b834f1c in QComboBox::internalActivate (this=0x82452b0, index=2) 
    at widgets/qcombobox.cpp:1123 
#27 0x3bb2ecd8 in QComboBox::qt_invoke (this=0x82452b0, _id=49, _o=0xafffe750) 
    at .moc/debug-shared-mt/moc_qcombobox.cpp:195 
#28 0x3b79816f in QObject::activate_signal (this=0x8249e50, clist=0x825fd20,  
    o=0xafffe750) at kernel/qobject.cpp:2357 
#29 0x3b7984c4 in QObject::activate_signal (this=0x8249e50, signal=8, param=2) 
    at kernel/qobject.cpp:2450 
#30 0x3bb38722 in QListBox::selected (this=0x8249e50, t0=2) 
    at .moc/debug-shared-mt/moc_qlistbox.cpp:258 
#31 0x3b874d35 in QListBox::mouseDoubleClickEvent (this=0x8249e50,  
    e=0xafffeb20) at widgets/qlistbox.cpp:2217 
#32 0x3b7d0dd3 in QWidget::event (this=0x8249e50, e=0xafffeb20) 
    at kernel/qwidget.cpp:4679 
#33 0x3b73442a in QApplication::internalNotify (this=0xaffff500,  
    receiver=0x8249e50, e=0xafffeb20) at kernel/qapplication.cpp:2635 
#34 0x3b733c4c in QApplication::notify (this=0xaffff500, receiver=0x8249e50,  
    e=0xafffeb20) at kernel/qapplication.cpp:2421 
#35 0x3b277785 in KApplication::notify (this=0xaffff500, receiver=0x8249e50,  
    event=0xafffeb20) at kdecore/kapplication.cpp:497 
#36 0x3aaf7cb4 in QApplication::sendEvent (receiver=0x8249e50,  
    event=0xafffeb20) at qapplication.h:491 
#37 0x3b838421 in QComboBox::eventFilter (this=0x82452b0, object=0x8249e50,  
    event=0xafffed00) at widgets/qcombobox.cpp:1787 
#38 0x3b795a27 in QObject::activate_filters (this=0x8249e50, e=0xafffed00) 
    at kernel/qobject.cpp:902 
#39 0x3b7958a5 in QObject::event (this=0x8249e50, e=0xafffed00) 
    at kernel/qobject.cpp:735 
#40 0x3b7d0cbd in QWidget::event (this=0x8249e50, e=0xafffed00) 
    at kernel/qwidget.cpp:4655 
#41 0x3b73442a in QApplication::internalNotify (this=0xaffff500,  
    receiver=0x8249e50, e=0xafffed00) at kernel/qapplication.cpp:2635 
#42 0x3b733c4c in QApplication::notify (this=0xaffff500, receiver=0x82202f0,  
    e=0xafffef60) at kernel/qapplication.cpp:2421 
#43 0x3b277785 in KApplication::notify (this=0xaffff500, receiver=0x82202f0,  
    event=0xafffef60) at kdecore/kapplication.cpp:497 
#44 0x3b6c70b6 in QApplication::sendSpontaneousEvent (receiver=0x82202f0,  
    event=0xafffef60) at qapplication.h:494 
#45 0x3b6bfb2c in QETWidget::translateMouseEvent (this=0x82202f0,  
    event=0xaffff310) at kernel/qapplication_x11.cpp:4232 
#46 0x3b6bd9f0 in QApplication::x11ProcessEvent (this=0xaffff500,  
    event=0xaffff310) at kernel/qapplication_x11.cpp:3452 
#47 0x3b6d8e04 in QEventLoop::processEvents (this=0x80a1a18, flags=4) 
    at kernel/qeventloop_x11.cpp:192 
#48 0x3b748c36 in QEventLoop::enterLoop (this=0x80a1a18) 
    at kernel/qeventloop.cpp:198 
#49 0x3b7345f1 in QApplication::enter_loop (this=0xaffff500) 
    at kernel/qapplication.cpp:2790 
#50 0x3b93601c in QDialog::exec (this=0x8206ac0) at dialogs/qdialog.cpp:432 
#51 0x3c2b0cc3 in kdemain (_argc=2, _argv=0x8071098) 
    at kcontrol/kcontrol/kcmshell.cpp:261 
#52 0x0804e2d7 in launch (argc=2, _name=0x8071e04 "kcmshell",  
    args=0x8071e16 "\001", cwd=0x0, envc=1, envs=0x8071e27 "",  
    reset_env=false, tty=0x0, avoid_loops=false,  
    startup_id_str=0x8071e2b "ugly.local;1094744833;30488;7931_TIME28284341") 
    at kinit/kinit.cpp:599 
#53 0x0804f5f8 in handle_launcher_request (sock=8) at kinit/kinit.cpp:1163 
#54 0x0804fcf0 in handle_requests (waitForPid=0) at kinit/kinit.cpp:1364 
#55 0x08051373 in main (argc=3, argv=0xaffffbb4, envp=0xaffffbc4) 
    at kinit/kinit.cpp:1817