barre des taches

bonjour,
sous une fedora 3, la barre des taches d'un seul utilisateur a disparue
! je n'arrive pas a trouver d'infos sur les faq de fedora, ni sous
google. Est-ce que qqn aurait rencontrait ce problème ?

c'est le tableau de bord kicker de kde qui envoie un message d'erreur et
les messages de la pile d'appels sont les suivants:

===================== DEBUT

Using host libthread_db library "/lib/tls/libthread_db.so.1".
`shared object read from target memory' has disappeared; keeping its 
symbols.
[Thread debugging using libthread_db enabled]
[New Thread -1208572224 (LWP 6022)]
[KCrash handler]
#4  0xb7a88389 in KlipperWidget::saveSession ()
    from /usr/lib/kde3/klipper_panelapplet.so
#5  0xb7a843bf in KlipperApplet::~KlipperApplet ()
    from /usr/lib/kde3/klipper_panelapplet.so
#6  0x06656f10 in QWidget::~QWidget () from 
/usr/lib/qt-3.3/lib/libqt-mt.so.3
#7  0x069626c1 in QHBox::~QHBox () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#8  0x06656f10 in QWidget::~QWidget () from 
/usr/lib/qt-3.3/lib/libqt-mt.so.3
#9  0x0047f48c in BaseContainer::~BaseContainer ()
    from /usr/lib/libkdeinit_kicker.so
#10 0x0048538e in AppletContainer::~AppletContainer ()
    from /usr/lib/libkdeinit_kicker.so
#11 0x06656a70 in QWidget::~QWidget () from 
/usr/lib/qt-3.3/lib/libqt-mt.so.3
#12 0x06656f10 in QWidget::~QWidget () from 
/usr/lib/qt-3.3/lib/libqt-mt.so.3
#13 0x0673561f in QViewportWidget::~QViewportWidget ()
    from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#14 0x06734a02 in QScrollView::~QScrollView ()
    from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#15 0x001172bf in Panner::~Panner () from /usr/lib/libkickermain.so.1
#16 0x00477aef in ContainerArea::~ContainerArea ()
    from /usr/lib/libkdeinit_kicker.so
#17 0x06656f10 in QWidget::~QWidget () from 
/usr/lib/qt-3.3/lib/libqt-mt.so.3
#18 0x06cb8fc8 in KPanelExtension::~KPanelExtension ()
    from /usr/lib/libkdeui.so.4
#19 0x00498647 in PanelExtension::~PanelExtension ()
    from /usr/lib/libkdeinit_kicker.so
#20 0x06656f10 in QWidget::~QWidget () from 
/usr/lib/qt-3.3/lib/libqt-mt.so.3
#21 0x004857ae in ExtensionContainer::~Ext   from 
/usr/lib/libkdeinit_kicker.so
#22 0x0048d507 in ExtensionManager::~ExtensionManager ()
    from /usr/lib/libkdeinit_kicker.so
#23 0x0048e7de in ExtensionManager::workArea ()
    from /usr/lib/libkdeinit_kicker.so
#24 0x0097f467 in exit () from /lib/tls/libc.so.6
#25 0x0655369a in qt_badwindow () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#26 0x096987c8 in ?? ()
#27 0xbfa8b978 in ?? ()
#28 0x068cfef3 in QGList::append () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
ensionContainer ()

============= FIN

merci
Gédéon Légaut