Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.85 (KDE 4.2.85 (KDE 4.3 Beta1))
Qt Version: 4.5.1
Operating System: Linux 2.6.30-5-generic i686
Distribution: Ubuntu karmic (development branch)

What I was doing when the application crashed:
If I clicked right mouse button on application load notification on taskbar (smplayer, kmail, etc.), then plasma segfault.

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 0 (LWP 4057)]

Thread 2 (Thread 0xac3abb90 (LWP 4060)):
#0  0x00d0b422 in __kernel_vsyscall ()
#1  0x00c3e0e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x00b2143d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x01d8e167 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0x00d8923a in ?? () from /usr/lib/libQtNetwork.so.4
#5  0x01d8d0fe in ?? () from /usr/lib/libQtCore.so.4
#6  0x00c3a4ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0x00b125ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb737c730 (LWP 4057)):
[KCrash Handler]
#6  0x03443f37 in TaskManager::Task::window () from /usr/lib/libtaskmanager.so.4
#7  0x01e8fcaf in QObject::event () from /usr/lib/libQtCore.so.4
#8  0x01b188a4 in QGraphicsWidget::event () from /usr/lib/libQtGui.so.4
#9  0x01489c1c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#10 0x014913f4 in QApplication::notify () from /usr/lib/libQtGui.so.4
#11 0x0115c50a in KApplication::notify () from /usr/lib/libkdeui.so.5
#12 0x01e7fb1b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#13 0x01ead6a6 in ?? () from /usr/lib/libQtCore.so.4
#14 0x01eab050 in ?? () from /usr/lib/libQtCore.so.4
#15 0x01fadf68 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#16 0x01fb1578 in ?? () from /usr/lib/libglib-2.0.so.0
#17 0x01fb16ea in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#18 0x01eaaf9c in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#19 0x0152b975 in ?? () from /usr/lib/libQtGui.so.4
#20 0x01e7e0a9 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#21 0x01e7e4f2 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#22 0x01e8087f in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#23 0x01489a97 in QApplication::exec () from /usr/lib/libQtGui.so.4
#24 0x0013f94d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#25 0x080485cb in _start ()