Version:            (using KDE KDE 3.5.6)
Installed from:    Ubuntu Packages

I had several tabs in Konqueror opened. When I've closed all of them (but the first one, IIRC) Konqueror crashed:

Using host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1233025328 (LWP 16391)]
[KCrash handler]
#5  0x00000000 in ?? ()
#6  0xb5ee6704 in DOM::Node::setPrefix (this=0xbffd6dc0, prefix=@0xa30ae40)
    at /build/buildd/kdelibs-3.5.6/./khtml/dom/dom_exception.h:60
#7  0xb5e7bdc7 in KJS::getDOMNode (exec=0xbffd7394, n=@0xbffd6dc0)
    at /build/buildd/kdelibs-3.5.6/./khtml/ecma/kjs_dom.cpp:1532
#8  0xb5e8b110 in KJS::HTMLCollection::getNamedItems (this=0xbffd6e68, 
    exec=0xbffd7394, propertyName=@0xbffd7008)
    at /build/buildd/kdelibs-3.5.6/./khtml/ecma/kjs_html.cpp:3601
#9  0xb5ec2f68 in KJS::HTMLElement::tryGet (this=0x8f455e0, exec=0xbffd7394, 
    propertyName=@0xbffd7008)
    at /build/buildd/kdelibs-3.5.6/./khtml/dom/html_form.h:223
#10 0xb5e74963 in KJS::DOMObject::put (this=0xbffd7088, exec=0x8f455e0, 
    propertyName=@0xbffd7394, value=@0xbffd7008, attr=-1073909836)
    at /usr/share/qt3/include/qstring.h:847
#11 0xb5b9ca4a in KJS::Reference::getValue (this=0xbffd6ff8, exec=0xbffd7394)
    at /build/buildd/kdelibs-3.5.6/./kjs/reference.cpp:143
#12 0xb5b9cf89 in KJS::Node::evaluate (this=0xa08e268, exec=0xbffd7394)
    at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:130
#13 0xb5bb24ec in KJS::AssignNode::evaluate (this=0xa08e280, exec=0xbffd7394)
    at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:1562
#14 0xb5bb1c7e in KJS::ExprStatementNode::execute (this=0xa08e2a0, 
    exec=0xbffd7394) at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:1980
#15 0xb5bb0932 in KJS::ForNode::execute (this=0xa08e2d0, exec=0xbffd7394)
    at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:2199
#16 0xb5bae188 in KJS::SourceElementsNode::execute (this=0xa0e35a0, 
    exec=0xbffd7394) at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:3097
#17 0xb5b82f19 in KJS::BlockNode::execute (this=0xa3064b8, exec=0xbffd7394)
    at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:1942
#18 0xb5b9b776 in KJS::DeclaredFunctionImp::execute (this=0xa1bef10, 
    exec=0xbffd7394) at /build/buildd/kdelibs-3.5.6/./kjs/function.cpp:588
#19 0xb5b9d2f1 in KJS::FunctionImp::call (this=0xa1bef10, exec=0xbffd79c4, 
    thisObj=@0xbffd7470, args=@0xbffd7464)
    at /build/buildd/kdelibs-3.5.6/./kjs/function.cpp:363
#20 0xb5b9e139 in KJS::Object::call (this=0xbffd7478, exec=0xbffd79c4, 
    thisObj=@0xbffd7470, args=@0xbffd7464)
    at /build/buildd/kdelibs-3.5.6/./kjs/object.cpp:73
#21 0xb5bb4b71 in KJS::FunctionCallNode::evaluate (this=0xa1c5a38, 
    exec=0xbffd79c4) at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:870
#22 0xb5bb46a9 in KJS::ArgumentListNode::evaluateList (this=0xa1c5a50, 
    exec=0xbffd79c4) at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:720
#23 0xb5bb4797 in KJS::ArgumentsNode::evaluateList (this=0xa1c5a68, 
    exec=0xbffd79c4) at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:756
#24 0xb5bb483a in KJS::FunctionCallNode::evaluate (this=0xa1c5a80, 
    exec=0xbffd79c4) at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:832
#25 0xb5bb382c in KJS::AddNode::evaluate (this=0xa1c5c08, exec=0xbffd79c4)
    at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:1238
#26 0xb5bb24ec in KJS::AssignNode::evaluate (this=0xa1c5c28, exec=0xbffd79c4)
    at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:1562
#27 0xb5bb1c7e in KJS::ExprStatementNode::execute (this=0xa1c5c48, 
    exec=0xbffd79c4) at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:1980
#28 0xb5bae0e8 in KJS::SourceElementsNode::execute (this=0xa1c5c78, 
    exec=0xbffd79c4) at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:3091
#29 0xb5b82f19 in KJS::BlockNode::execute (this=0xa1c6070, exec=0xbffd79c4)
    at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:1942
#30 0xb5bb1b0b in KJS::IfNode::execute (this=0xa1bf3c0, exec=0xbffd79c4)
    at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:2021
#31 0xb5bae188 in KJS::SourceElementsNode::execute (this=0xa112e20, 
    exec=0xbffd79c4) at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:3097
#32 0xb5b82f19 in KJS::BlockNode::execute (this=0xa14d458, exec=0xbffd79c4)
    at /build/buildd/kdelibs-3.5.6/./kjs/nodes.cpp:1942
#33 0xb5b9b776 in KJS::DeclaredFunctionImp::execute (this=0xa2ed0c8, 
    exec=0xbffd79c4) at /build/buildd/kdelibs-3.5.6/./kjs/function.cpp:588
#34 0xb5b9d2f1 in KJS::FunctionImp::call (this=0xa2ed0c8, exec=0x8f3dc28, 
    thisObj=@0xbffd7ab0, args=@0xbffd7a90)
    at /build/buildd/kdelibs-3.5.6/./kjs/function.cpp:363
#35 0xb5b9e139 in KJS::Object::call (this=0x9af248c, exec=0x8f3dc28, 
    thisObj=@0xbffd7ab0, args=@0xbffd7a90)
    at /build/buildd/kdelibs-3.5.6/./kjs/object.cpp:73
#36 0xb5e92ccc in KJS::JSEventListener::handleEvent (this=0x9af2480, 
    evt=@0xbffd7af0)
    at /build/buildd/kdelibs-3.5.6/./khtml/ecma/kjs_events.cpp:82
#37 0xb5d2372a in DOM::NodeImpl::handleLocalEvents (this=0x8f84100, 
    evt=0x9f06118, useCapture=false)
    at /build/buildd/kdelibs-3.5.6/./khtml/xml/dom_nodeimpl.cpp:597
#38 0xb5d2818b in DOM::NodeImpl::dispatchGenericEvent (this=0xa10e3f8, 
    evt=0x9f06118) at /build/buildd/kdelibs-3.5.6/./khtml/misc/shared.h:62
#39 0xb5d2831f in DOM::NodeImpl::dispatchEvent (this=0xa10e3f8, 
    evt=0x9f06118, exceptioncode=@0xbffd7ca8, tempEvent=true)
    at /build/buildd/kdelibs-3.5.6/./khtml/xml/dom_nodeimpl.cpp:335
#40 0xb5cc73a5 in KHTMLView::dispatchMouseEvent (this=0x8ccbcd8, eventId=8, 
    targetNode=0xa10e3f8, targetNodeNonShared=0xa10e3f8, cancelable=false, 
    detail=0, _mouse=0xbffd8440, setUnder=true, mouseEventType=4)
    at /build/buildd/kdelibs-3.5.6/./khtml/khtmlview.cpp:3170
#41 0xb5cf3357 in KHTMLView::viewportMouseMoveEvent (this=0x8ccbcd8, 
    _mouse=0xbffd8440)
    at /build/buildd/kdelibs-3.5.6/./khtml/khtmlview.cpp:1144
#42 0xb7327412 in QScrollView::eventFilter () from /usr/lib/libqt-mt.so.3
#43 0xb5cd0ee9 in KHTMLView::eventFilter (this=0x8ccbcd8, o=0x8dcabc8, 
    e=0xbffd8440) at /usr/share/qt3/include/qwidget.h:877
#44 0xb71efd34 in QObject::activate_filters () from /usr/lib/libqt-mt.so.3
#45 0xb71efdb2 in QObject::event () from /usr/lib/libqt-mt.so.3
#46 0xb722748b in QWidget::event () from /usr/lib/libqt-mt.so.3
#47 0xb71879a8 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#48 0xb7189b66 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#49 0xb7889bc2 in KApplication::notify (this=0xbffd8d68, receiver=0x8dcabc8, 
    event=0xbffd8440)
    at /build/buildd/kdelibs-3.5.6/./kdecore/kapplication.cpp:503
#50 0xb711a21d in QApplication::sendSpontaneousEvent ()
   from /usr/lib/libqt-mt.so.3
#51 0xb7118e82 in QETWidget::translateMouseEvent ()
   from /usr/lib/libqt-mt.so.3
#52 0xb7116f6c in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#53 0xb712e140 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#54 0xb71a207e in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#55 0xb71a1e8e in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#56 0xb7189551 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#57 0xb665fca4 in kdemain (argc=4, argv=0x808f0d8)
    at /build/buildd/kdebase-3.5.6/./konqueror/konq_main.cc:206
#58 0xb7efc464 in kdeinitmain (argc=4, argv=0x808f0d8) at konqueror_dummy.cc:3
#59 0x0804e6bf in launch (argc=4, _name=0x808ead4 "konqueror", 
    args=0x808eb2c "", cwd=0x808eb2d "/home/daniel", envc=30, 
    envs=0x808ef5e "", reset_env=true, tty=0x0, avoid_loops=false, 
    startup_id_str=0x808ef63 "base;1170778318;66162;7634_TIME2547212720")
    at /build/buildd/kdelibs-3.5.6/./kinit/kinit.cpp:673
#60 0x0804ef42 in handle_launcher_request (sock=5)
    at /build/buildd/kdelibs-3.5.6/./kinit/kinit.cpp:1240
#61 0x0804f4b1 in handle_requests (waitForPid=0)
    at /build/buildd/kdelibs-3.5.6/./kinit/kinit.cpp:1433
#62 0x080505ac in main (argc=5, argv=0xbffd94f4, envp=0xbffd950c)
    at /build/buildd/kdelibs-3.5.6/./kinit/kinit.cpp:1909
#63 0xb7c78ebc in __libc_start_main () from /lib/libc.so.6
#64 0x0804bb51 in _start ()