Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I was just navigating and crashed!
I wrote some codes from internet and them crashed!

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 10611)]

Thread 2 (Thread 0xa8554b90 (LWP 10615)):
#0  0xb7fec430 in __kernel_vsyscall ()
#1  0xb65070e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb66e72ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7de9172 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb7729ac2 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0xb7de8132 in ?? () from /usr/lib/libQtCore.so.4
#6  0xb65034ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb66d849e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb6011a10 (LWP 10611)):
[KCrash Handler]
#6  0xb78bc25a in KDirModel::dirLister () from /usr/lib/libkio.so.5
#7  0xb5cc7f6e in KFilePreviewGenerator::qt_metacall () from /usr/lib/libkfile.so.4
#8  0xb7ef21b8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#9  0xb7ef2e42 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#10 0xb702a107 in QClipboard::dataChanged () from /usr/lib/libQtGui.so.4
#11 0xb6a14d55 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#12 0xb6a4037a in ?? () from /usr/lib/libQtGui.so.4
#13 0xb6550b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#14 0xb65540eb in ?? () from /usr/lib/libglib-2.0.so.0
#15 0xb6554268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#16 0xb7f082f8 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#17 0xb6a3fa75 in ?? () from /usr/lib/libQtGui.so.4
#18 0xb7edb1fa in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#19 0xb7edb642 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#20 0xb7eddae9 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#21 0xb699dbb7 in QApplication::exec () from /usr/lib/libQtGui.so.4
#22 0xb3c06120 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#23 0x0804e27d in _start ()

Reported using DrKonqi