Version:            (using KDE 4.2.2)
Compiler:          gcc-4.3.2-r3 
OS:                Linux
Installed from:    Gentoo Packages

My workspace crashes on loading any application (e.g. thunderbird, firefox).
Once it crashed it restarts and works just fine.

Application: Plasma Workspace (plasma), signal SIGSEGV
0x00007fd4e9755421 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 10280)]

Thread 4 (Thread 0x7fd4cbbd1950 (LWP 10281)):
#0  0x00007fd4ec46ba09 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fd4ec6d7545 in QWaitCondition::wait () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007fd4edc1b764 in ?? () from /usr/lib64/qt4/libQtNetwork.so.4
#3  0x00007fd4ec6d6d20 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007fd4ec467097 in start_thread () from /lib/libpthread.so.0
#5  0x00007fd4e97826dd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fd4ca586950 (LWP 10282)):
#0  0x00007fd4e977c402 in select () from /lib/libc.so.6
#1  0x00007fd4ec78610e in ?? () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007fd4ec6d6d20 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#3  0x00007fd4ec467097 in start_thread () from /lib/libpthread.so.0
#4  0x00007fd4e97826dd in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fd4c9d85950 (LWP 10284)):
#0  0x00007fd4ec46ba09 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fd4ec6d7545 in QWaitCondition::wait () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007fd4cd7e08c1 in ?? () from /usr/kde/4.2/lib64/kde4/plasma_wallpaper_image.so
#3  0x00007fd4ec6d6d20 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007fd4ec467097 in start_thread () from /lib/libpthread.so.0
#5  0x00007fd4e97826dd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fd4eefab7b0 (LWP 10280)):
[KCrash Handler]
#5  0x00007fd4ec7b2f2c in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#6  0x00007fd4ce7bbc2f in TaskManager::AbstractGroupingStrategy::groupRemoved () from /usr/kde/4.2/lib64/libtaskmanager.so.4
#7  0x00007fd4ce7bcfbd in TaskManager::AbstractGroupingStrategy::closeGroup () from /usr/kde/4.2/lib64/libtaskmanager.so.4
#8  0x00007fd4ce7c31e1 in ?? () from /usr/kde/4.2/lib64/libtaskmanager.so.4
#9  0x00007fd4ce7c3bcd in ?? () from /usr/kde/4.2/lib64/libtaskmanager.so.4
#10 0x00007fd4ec7b2a1a in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#11 0x00007fd4ce7d2262 in TaskManager::TaskGroup::itemRemoved () from /usr/kde/4.2/lib64/libtaskmanager.so.4
#12 0x00007fd4ce7d2507 in TaskManager::TaskGroup::remove () from /usr/kde/4.2/lib64/libtaskmanager.so.4
#13 0x00007fd4ce7bf66e in TaskManager::GroupManager::remove () from /usr/kde/4.2/lib64/libtaskmanager.so.4
#14 0x00007fd4ce7c0800 in TaskManager::GroupManager::qt_metacall () from /usr/kde/4.2/lib64/libtaskmanager.so.4
#15 0x00007fd4ec7b2a1a in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#16 0x00007fd4ce7d53d5 in TaskManager::TaskManager::taskRemoved () from /usr/kde/4.2/lib64/libtaskmanager.so.4
#17 0x00007fd4ce7d61bb in TaskManager::TaskManager::windowRemoved () from /usr/kde/4.2/lib64/libtaskmanager.so.4
#18 0x00007fd4ce7d7941 in TaskManager::TaskManager::qt_metacall () from /usr/kde/4.2/lib64/libtaskmanager.so.4
#19 0x00007fd4ec7b2a1a in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#20 0x00007fd4ed489162 in KWindowSystem::windowRemoved () from /usr/kde/4.2/lib64/libkdeui.so.5
#21 0x00007fd4ed48d118 in ?? () from /usr/kde/4.2/lib64/libkdeui.so.5
#22 0x00007fd4ed496090 in NETRootInfo::update () from /usr/kde/4.2/lib64/libkdeui.so.5
#23 0x00007fd4ed4963e9 in NETRootInfo::event () from /usr/kde/4.2/lib64/libkdeui.so.5
#24 0x00007fd4ed48d5bb in ?? () from /usr/kde/4.2/lib64/libkdeui.so.5
#25 0x00007fd4ed35e5ae in KApplication::x11EventFilter () from /usr/kde/4.2/lib64/libkdeui.so.5
#26 0x00007fd4eecb0ff1 in ?? () from /usr/kde/4.2/lib64/libkdeinit4_plasma.so
#27 0x00007fd4eb922d4f in ?? () from /usr/lib64/qt4/libQtGui.so.4
#28 0x00007fd4eb92f951 in QApplication::x11ProcessEvent () from /usr/lib64/qt4/libQtGui.so.4
#29 0x00007fd4eb953c93 in ?? () from /usr/lib64/qt4/libQtGui.so.4
#30 0x00007fd4e66d94b2 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#31 0x00007fd4e66dc795 in ?? () from /usr/lib/libglib-2.0.so.0
#32 0x00007fd4e66dcc9b in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#33 0x00007fd4ec7c66ee in QEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#34 0x00007fd4eb953aaf in ?? () from /usr/lib64/qt4/libQtGui.so.4
#35 0x00007fd4ec7a0d25 in QEventLoop::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#36 0x00007fd4ec7a0ea6 in QEventLoop::exec () from /usr/lib64/qt4/libQtCore.so.4
#37 0x00007fd4ec7a2d09 in QCoreApplication::exec () from /usr/lib64/qt4/libQtCore.so.4
#38 0x00007fd4eec9ffb0 in kdemain () from /usr/kde/4.2/lib64/libkdeinit4_plasma.so
#39 0x00007fd4e96da5d4 in __libc_start_main () from /lib/libc.so.6
#40 0x0000000000400929 in _start ()