Version:            (using KDE 4.2.3)
OS:                Linux
Installed from:    Fedora RPMs

Applicazione: Spazio di lavoro di Plasma (plasma), segnale SIGSEGV
[Current thread is 1 (Thread 0xb8060770 (LWP 2658))]

Thread 3 (Thread 0xacd88b90 (LWP 2659)):
#0  0x00f4f416 in __kernel_vsyscall ()
#1  0x00af1105 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x055814d2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0x05eb32c2 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0x0558048e in ?? () from /usr/lib/libQtCore.so.4
#5  0x00aed51f in start_thread () from /lib/libpthread.so.0
#6  0x00a2304e in clone () from /lib/libc.so.6

Thread 2 (Thread 0xa71cdb90 (LWP 2660)):
#0  0x00f4f416 in __kernel_vsyscall ()
#1  0x00af1105 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x055814d2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0x00f78cda in ?? () from /usr/lib/kde4/plasma_wallpaper_image.so
#4  0x0558048e in ?? () from /usr/lib/libQtCore.so.4
#5  0x00aed51f in start_thread () from /lib/libpthread.so.0
#6  0x00a2304e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb8060770 (LWP 2658)):
[KCrash Handler]
#6  0x055a39fa in QHashData::nextNode () from /usr/lib/libQtCore.so.4
#7  0x05c9a244 in TaskManager::GroupManager::add () from /usr/lib/libtaskmanager.so.4
#8  0x05c9bcaf in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#9  0x0568aa08 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#10 0x0568c192 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0x05cb2f83 in TaskManager::TaskManager::taskAdded () from /usr/lib/libtaskmanager.so.4
#12 0x05cb5236 in TaskManager::TaskManager::windowAdded () from /usr/lib/libtaskmanager.so.4
#13 0x05cb630c in TaskManager::TaskManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#14 0x0568aa08 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0x0568c192 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#16 0x064a1a03 in KWindowSystem::windowAdded () from /usr/lib/libkdeui.so.5
#17 0x064a40b9 in ?? () from /usr/lib/libkdeui.so.5
#18 0x064b3710 in NETRootInfo::update () from /usr/lib/libkdeui.so.5
#19 0x064b3adf in NETRootInfo::event () from /usr/lib/libkdeui.so.5
#20 0x064a44cd in ?? () from /usr/lib/libkdeui.so.5
#21 0x0635f819 in KApplication::x11EventFilter () from /usr/lib/libkdeui.so.5
#22 0x008e6a97 in ?? () from /usr/lib/libkdeinit4_plasma.so
#23 0x03786d3e in ?? () from /usr/lib/libQtGui.so.4
#24 0x03799288 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#25 0x037c3f6a in ?? () from /usr/lib/libQtGui.so.4
#26 0x00b7a258 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#27 0x00b7d903 in ?? () from /lib/libglib-2.0.so.0
#28 0x00b7dac1 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#29 0x056a0188 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#30 0x037c3665 in ?? () from /usr/lib/libQtGui.so.4
#31 0x05672d8a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#32 0x056731ca in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#33 0x05675679 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#34 0x03723b67 in QApplication::exec () from /usr/lib/libQtGui.so.4
#35 0x008d6196 in kdemain () from /usr/lib/libkdeinit4_plasma.so
#36 0x080486f2 in _start ()

P.S. I updated to the last version from Fedora rpms but i have the same problem!