Version:            (using Devel)
Installed from:    Compiled sources

When starting Konsole plasma craches giving me following report:
Program: Przestrzeń robocza Plazmy (plasma), sygnał SIGSEGV
[Current thread is 1 (Thread 0xb5234700 (LWP 3951))]

Thread 5 (Thread 0xa97d6b90 (LWP 3953)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb63473e1 in select () from /lib/libc.so.6
#2  0xb663ddc7 in ?? () from /usr/lib/libQtCore.so.4
#3  0xb656e85e in ?? () from /usr/lib/libQtCore.so.4
#4  0xb650c1b5 in start_thread () from /lib/libpthread.so.0
#5  0xb634e38e in clone () from /lib/libc.so.6

Thread 4 (Thread 0xa8f8fb90 (LWP 3956)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb650fc35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb656f872 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#3  0xb796c0d2 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb656e85e in ?? () from /usr/lib/libQtCore.so.4
#5  0xb650c1b5 in start_thread () from /lib/libpthread.so.0
#6  0xb634e38e in clone () from /lib/libc.so.6

Thread 3 (Thread 0xa8739b90 (LWP 3957)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb650fc35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb656f872 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#3  0xa9d1f7fa in ?? () from /usr/lib/kde4/plasma_wallpaper_image.so
#4  0xb656e85e in ?? () from /usr/lib/libQtCore.so.4
#5  0xb650c1b5 in start_thread () from /lib/libpthread.so.0
#6  0xb634e38e in clone () from /lib/libc.so.6

Thread 2 (Thread 0xa7a25b90 (LWP 3968)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb650ff62 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb656f84c in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#3  0xb65649c6 in ?? () from /usr/lib/libQtCore.so.4
#4  0xb656e85e in ?? () from /usr/lib/libQtCore.so.4
#5  0xb650c1b5 in start_thread () from /lib/libpthread.so.0
#6  0xb634e38e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5234700 (LWP 3951)):
[KCrash Handler]
#6  0xb6e25f3e in ?? () from /usr/lib/libQtGui.so.4
#7  0xb6e2625b in QStandardItem::row() const () from /usr/lib/libQtGui.so.4
#8  0xa99fc3d4 in Kickoff::RecentlyUsedModel::recentApplicationRemoved(KSharedPtr<KService>) () from /usr/lib/liblibkickoff.so
#9  0xa99fcbea in Kickoff::RecentlyUsedModel::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/liblibkickoff.so
#10 0xb6673580 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#11 0xb6674302 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#12 0xa99f7853 in Kickoff::RecentApplications::applicationRemoved(KSharedPtr<KService>) () from /usr/lib/liblibkickoff.so
#13 0xa99f8a4a in Kickoff::RecentApplications::add(KSharedPtr<KService>) () from /usr/lib/liblibkickoff.so
#14 0xa9a06d95 in Kickoff::ServiceItemHandler::openUrl(KUrl const&) () from /usr/lib/liblibkickoff.so
#15 0xa9a06325 in ?? () from /usr/lib/liblibkickoff.so
#16 0xa9a05ca3 in Kickoff::UrlItemLauncher::openItem(QModelIndex const&) () from /usr/lib/liblibkickoff.so
#17 0xa9a985cf in ?? () from /usr/lib/kde4/plasma_applet_launcher.so
#18 0xb665db3a in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#19 0xb68ce8da in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#20 0xb68d7111 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#21 0xb76ba9dd in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#22 0xb665e961 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#23 0xb68d639e in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#24 0xb6940746 in ?? () from /usr/lib/libQtGui.so.4
#25 0xb693faf5 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#26 0xb69680ba in ?? () from /usr/lib/libQtGui.so.4
#27 0xb56449a8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#28 0xb5648063 in ?? () from /usr/lib/libglib-2.0.so.0
#29 0xb5648221 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#30 0xb6688fb8 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#31 0xb69677b5 in ?? () from /usr/lib/libQtGui.so.4
#32 0xb665d01a in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#33 0xb665d1da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0xb665f895 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#35 0xb68ce777 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#36 0xb7f5f1c6 in kdemain () from /usr/lib/libkdeinit4_plasma.so
#37 0x08048782 in _start ()

When I start VirtualBox, the whole plasma dissapears but I get no crash report.

grek@linux-p3yg:~> kde4-config --version
Qt: 4.4.3
KDE: 4.2.60 (KDE 4.2.60 (KDE 4.3 >= 20090116)) "release 1.6"
kde4-config: 1.0