Kde freezes in Fedora 10

[GMS S]

Hi,
rpm -qa | grep kde

kdepimlibs-akonadi-4.2.1-2.fc10.1.i386
akonadi-1.1.1-6.fc10.i386
[shibly1 at localhost ~]$ rpm -qa | grep kde
kdelibs-common-4.1.2-5.fc10.i386
kde-i18n-Bengali-3.5.10-1.fc10.noarch
kdegames3-libs-3.5.10-3.fc10.i386
kdepim-libs-4.2.1-3.fc10.i386
kdebase-libs-4.2.1-2.fc10.i386
kdebase-4.2.1-2.fc10.i386
kdesdk-utils-4.1.2-4.fc10.i386
kdeedu-marble-4.2.1-1.fc10.i386
kdeutils-printer-applet-4.2.1-3.fc10.i386
kdemultimedia-libs-4.2.1-1.fc10.i386
kdegraphics-4.2.1-3.fc10.i386
kde-settings-pulseaudio-4.1-6.20090206svn.fc10.noarch
kdeartwork-4.2.1-1.fc10.i386
solar-kde-theme-0.1.16-2.fc10.noarch
kdevelop-3.5.3-1.fc10.i386
kdegames3-3.5.10-3.fc10.i386
kdebase-runtime-4.2.1-2.fc10.i386
kdepim-4.2.1-3.fc10.i386
lockdev-devel-1.0.1-13.fc10.i386
kdelibs3-3.5.10-1.fc10.i386
kdevelop-libs-3.5.3-1.fc10.i386
kdegraphics-libs-4.2.1-3.fc10.i386
kdegames-libs-4.2.1-1.fc10.i386
kdenetwork-libs-4.2.1-1.fc10.i386
kdeplasma-addons-4.2.1-1.fc10.i386
lockdev-1.0.1-13.fc10.i386
kde-settings-kdm-4.1-4.20081031svn.fc10.noarch
kde-settings-4.1-6.20090206svn.fc10.noarch
kdepimlibs-akonadi-4.2.1-2.fc10.1.i386
kdenetwork-4.2.1-1.fc10.i386
kdeutils-4.2.1-3.fc10.i386
kdesdk-libs-4.1.2-4.fc10.i386
kdelibs-4.2.1-4.fc10.i386
kdebase-runtime-libs-4.2.1-2.fc10.i386
kde-filesystem-4-23.fc10.noarch
kdepimlibs-devel-4.2.1-2.fc10.1.i386
kdemultimedia-4.2.1-1.fc10.i386
kdelibs3-devel-3.5.10-1.fc10.i386
kdegames-4.2.1-1.fc10.i386
kdebase-workspace-4.2.1-7.fc10.i386
kdelibs-devel-4.2.1-4.fc10.i386
kdepimlibs-4.2.1-2.fc10.1.i386
kdeaccessibility-4.2.1-1.fc10.i386
kdebase-workspace-libs-4.2.1-7.fc10.i386

After running firefox or konqueror kde freezes but the mouse moves.
Can anyone give any idea?

Thanks.