Version:            (using KDE 4.2.0)
OS:                Linux
Installed from:    Ubuntu Packages

After I logged in I opened GIMP and then tried to minimize it.  It seemed to be unresponsive so I tried to minimize it again by clicking on it's taskbar entry and then on the minimize button in the top right corner of the window.  I finally gave up and then tried to open Dolphin which instantly triggered a crash.  Dolphin eventually opened successfully but the crash report was displayed before Dolphin was fully loaded.  The following crash report was displayed.

Application: Plasma Workspace (plasma), signal SIGSEGV
0x00007fb3b70566e1 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 6097)]

Thread 3 (Thread 0x4214e950 (LWP 6098)):
#0  0x00007fb3b4d702d9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fb3b7b37349 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#2  0x00007fb3bb1d529c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007fb3b7b36362 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007fb3b4d6c3ea in start_thread () from /lib/libpthread.so.0
#5  0x00007fb3b7094cbd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x4294f950 (LWP 6099)):
#0  0x00007fb3b4d702d9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fb3b7b37349 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#2  0x00007fb39e787ef0 in ?? () from /usr/lib/kde4/plasma_wallpaper_image.so
#3  0x00007fb3b7b36362 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007fb3b4d6c3ea in start_thread () from /lib/libpthread.so.0
#5  0x00007fb3b7094cbd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fb3b0cdb730 (LWP 6097)):
[KCrash Handler]
#5  0x00007fb39fbe1bf3 in TaskManager::GroupManager::add () from /usr/lib/libtaskmanager.so.4
#6  0x00007fb39fbe3adb in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#7  0x00007fb3b7c33134 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#8  0x00007fb39fbf9dc2 in TaskManager::TaskManager::taskAdded () from /usr/lib/libtaskmanager.so.4
#9  0x00007fb39fbfbe0f in TaskManager::TaskManager::windowAdded () from /usr/lib/libtaskmanager.so.4
#10 0x00007fb39fbfcdff in TaskManager::TaskManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#11 0x00007fb3b7c33134 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#12 0x00007fb3baa3fea2 in KWindowSystem::windowAdded () from /usr/lib/libkdeui.so.5
#13 0x00007fb3baa421fc in ?? () from /usr/lib/libkdeui.so.5
#14 0x00007fb3baa51208 in NETRootInfo::update () from /usr/lib/libkdeui.so.5
#15 0x00007fb3baa5157b in NETRootInfo::event () from /usr/lib/libkdeui.so.5
#16 0x00007fb3baa4267b in ?? () from /usr/lib/libkdeui.so.5
#17 0x00007fb3ba9159f3 in KApplication::x11EventFilter () from /usr/lib/libkdeui.so.5
#18 0x00007fb3bc250434 in ?? () from /usr/lib/libkdeinit4_plasma.so
#19 0x00007fb3b839b7ef in ?? () from /usr/lib/libQtGui.so.4
#20 0x00007fb3b83ace26 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#21 0x00007fb3b83d52c4 in ?? () from /usr/lib/libQtGui.so.4
#22 0x00007fb3b338ad3b in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#23 0x00007fb3b338e50d in ?? () from /usr/lib/libglib-2.0.so.0
#24 0x00007fb3b338e6cb in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#25 0x00007fb3b7c4715f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#26 0x00007fb3b83d4a6f in ?? () from /usr/lib/libQtGui.so.4
#27 0x00007fb3b7c1d682 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#28 0x00007fb3b7c1d80d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#29 0x00007fb3b7c1fcbd in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#30 0x00007fb3bc23fd6b in kdemain () from /usr/lib/libkdeinit4_plasma.so
#31 0x00007fb3b6fcc466 in __libc_start_main () from /lib/libc.so.6
#32 0x00000000004007c9 in _start ()