Version:           Kde 4.2.2 (using KDE 4.2.2)
OS:                Linux
Installed from:    Ubuntu Packages

plasma randomly crash when adding widgets

Trying to add a new widget via  Add Widgets... ->
Install new widgets -> Download New Plasma Widgets 
cause Plasma randomly crash. 

Here it's the backtrace:


Application: Plasma Workspace (plasma), signal SIGSEGV
[Current thread is 0 (LWP 6126)]

Thread 7 (Thread 0xa9dd9b90 (LWP 6131)):
#0  0xb8070430 in __kernel_vsyscall ()
#1  0xb591c075 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb64e5bbd in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb66cf6f2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xa9f55c8a in ?? () from /usr/lib/kde4/plasma_wallpaper_image.so
#5  0xb66ce6ae in ?? () from /usr/lib/libQtCore.so.4
#6  0xb591850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb64d7a0e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 6 (Thread 0xa57b9b90 (LWP 6726)):
#0  0xb8070430 in __kernel_vsyscall ()
#1  0xb64cfdf1 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb679e150 in ?? () from /usr/lib/libQtCore.so.4
#3  0xb66ce6ae in ?? () from /usr/lib/libQtCore.so.4
#4  0xb591850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb64d7a0e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 5 (Thread 0xa4dffb90 (LWP 6846)):
#0  0xb8070430 in __kernel_vsyscall ()
#1  0xb591c075 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb64e5bbd in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb66cf6f2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb5b45148 in ?? () from /usr/lib/libthreadweaver.so.4
#5  0xb5b47eec in ?? () from /usr/lib/libthreadweaver.so.4
#6  0xb5b43d2b in ?? () from /usr/lib/libthreadweaver.so.4
#7  0xb5b47fea in ?? () from /usr/lib/libthreadweaver.so.4
#8  0xb5b456d3 in ?? () from /usr/lib/libthreadweaver.so.4
#9  0xb5b45fbe in ?? () from /usr/lib/libthreadweaver.so.4
#10 0xb5b465fb in ThreadWeaver::Thread::run () from /usr/lib/libthreadweaver.so.4
#11 0xb66ce6ae in ?? () from /usr/lib/libQtCore.so.4
#12 0xb591850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#13 0xb64d7a0e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 4 (Thread 0xa45feb90 (LWP 6847)):
#0  0xb8070430 in __kernel_vsyscall ()
#1  0xb591c075 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb64e5bbd in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb66cf6f2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb5b45148 in ?? () from /usr/lib/libthreadweaver.so.4
#5  0xb5b47eec in ?? () from /usr/lib/libthreadweaver.so.4
#6  0xb5b43d2b in ?? () from /usr/lib/libthreadweaver.so.4
#7  0xb5b47fea in ?? () from /usr/lib/libthreadweaver.so.4
#8  0xb5b456d3 in ?? () from /usr/lib/libthreadweaver.so.4
#9  0xb5b45fbe in ?? () from /usr/lib/libthreadweaver.so.4
#10 0xb5b465fb in ThreadWeaver::Thread::run () from /usr/lib/libthreadweaver.so.4
#11 0xb66ce6ae in ?? () from /usr/lib/libQtCore.so.4
#12 0xb591850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#13 0xb64d7a0e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 3 (Thread 0xa3dfdb90 (LWP 6848)):
#0  0xb8070430 in __kernel_vsyscall ()
#1  0xb591c075 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb64e5bbd in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb66cf6f2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb5b45148 in ?? () from /usr/lib/libthreadweaver.so.4
#5  0xb5b47eec in ?? () from /usr/lib/libthreadweaver.so.4
#6  0xb5b43d2b in ?? () from /usr/lib/libthreadweaver.so.4
#7  0xb5b47fea in ?? () from /usr/lib/libthreadweaver.so.4
#8  0xb5b456d3 in ?? () from /usr/lib/libthreadweaver.so.4
#9  0xb5b45fbe in ?? () from /usr/lib/libthreadweaver.so.4
#10 0xb5b465fb in ThreadWeaver::Thread::run () from /usr/lib/libthreadweaver.so.4
#11 0xb66ce6ae in ?? () from /usr/lib/libQtCore.so.4
#12 0xb591850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#13 0xb64d7a0e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread 0xa35fcb90 (LWP 6849)):
#0  0xb8070430 in __kernel_vsyscall ()
#1  0xb591c075 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb64e5bbd in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb66cf6f2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb5b45148 in ?? () from /usr/lib/libthreadweaver.so.4
#5  0xb5b47eec in ?? () from /usr/lib/libthreadweaver.so.4
#6  0xb5b43d2b in ?? () from /usr/lib/libthreadweaver.so.4
#7  0xb5b47fea in ?? () from /usr/lib/libthreadweaver.so.4
#8  0xb5b456d3 in ?? () from /usr/lib/libthreadweaver.so.4
#9  0xb5b45fbe in ?? () from /usr/lib/libthreadweaver.so.4
#10 0xb5b465fb in ThreadWeaver::Thread::run () from /usr/lib/libthreadweaver.so.4
#11 0xb66ce6ae in ?? () from /usr/lib/libQtCore.so.4
#12 0xb591850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#13 0xb64d7a0e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb54956c0 (LWP 6126)):
[KCrash Handler]
#6  0xb67d8e91 in ?? () from /usr/lib/libQtCore.so.4
#7  0xb67d817f in QSignalMapper::map () from /usr/lib/libQtCore.so.4
#8  0xb67d82ee in QSignalMapper::map () from /usr/lib/libQtCore.so.4
#9  0xb67d8bbb in QSignalMapper::qt_metacall () from /usr/lib/libQtCore.so.4
#10 0xb67d3a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0xb67d3e60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#12 0xb6a485f1 in QAction::triggered () from /usr/lib/libQtGui.so.4
#13 0xb6a48f5f in QAction::activate () from /usr/lib/libQtGui.so.4
#14 0xb6e26564 in ?? () from /usr/lib/libQtGui.so.4
#15 0xb6e26ff2 in QMenu::mouseReleaseEvent () from /usr/lib/libQtGui.so.4
#16 0xb789b705 in KMenu::mouseReleaseEvent () from /usr/lib/libkdeui.so.5
#17 0xb6aa6962 in QWidget::event () from /usr/lib/libQtGui.so.4
#18 0xb6e292e9 in QMenu::event () from /usr/lib/libQtGui.so.4
#19 0xb6a4e8ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#20 0xb6a570e1 in QApplication::notify () from /usr/lib/libQtGui.so.4
#21 0xb77b52ad in KApplication::notify () from /usr/lib/libkdeui.so.5
#22 0xb67bee61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#23 0xb6a5636e in QApplicationPrivate::sendMouseEvent () from /usr/lib/libQtGui.so.4
#24 0xb6ac08de in ?? () from /usr/lib/libQtGui.so.4
#25 0xb6abf9e5 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#26 0xb6ae97aa in ?? () from /usr/lib/libQtGui.so.4
#27 0xb575d718 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#28 0xb5760dc3 in ?? () from /usr/lib/libglib-2.0.so.0
#29 0xb5760f81 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#30 0xb67e9478 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#31 0xb6ae8ea5 in ?? () from /usr/lib/libQtGui.so.4
#32 0xb67bd52a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#33 0xb67bd6ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#34 0xb6e290b1 in QMenu::exec () from /usr/lib/libQtGui.so.4
#35 0xb6e3543a in ?? () from /usr/lib/libQtGui.so.4
#36 0xb6e36adf in QPushButton::qt_metacall () from /usr/lib/libQtGui.so.4
#37 0xb78a8dca in KPushButton::qt_metacall () from /usr/lib/libkdeui.so.5
#38 0xb67d3a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#39 0xb67d47e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#40 0xb703ce07 in QAbstractButton::pressed () from /usr/lib/libQtGui.so.4
#41 0xb6d8fd49 in ?? () from /usr/lib/libQtGui.so.4
#42 0xb6d8ff2e in QAbstractButton::mousePressEvent () from /usr/lib/libQtGui.so.4
#43 0xb78a8a11 in KPushButton::mousePressEvent () from /usr/lib/libkdeui.so.5
#44 0xb6aa6949 in QWidget::event () from /usr/lib/libQtGui.so.4
#45 0xb6d9003e in QAbstractButton::event () from /usr/lib/libQtGui.so.4
#46 0xb6e36910 in QPushButton::event () from /usr/lib/libQtGui.so.4
#47 0xb6a4e8ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#48 0xb6a570e1 in QApplication::notify () from /usr/lib/libQtGui.so.4
#49 0xb77b52ad in KApplication::notify () from /usr/lib/libkdeui.so.5
#50 0xb67bee61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#51 0xb6a5636e in QApplicationPrivate::sendMouseEvent () from /usr/lib/libQtGui.so.4
#52 0xb6ac0656 in ?? () from /usr/lib/libQtGui.so.4
#53 0xb6abf9e5 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#54 0xb6ae97aa in ?? () from /usr/lib/libQtGui.so.4
#55 0xb575d718 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#56 0xb5760dc3 in ?? () from /usr/lib/libglib-2.0.so.0
#57 0xb5760f81 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#58 0xb67e9478 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#59 0xb6ae8ea5 in ?? () from /usr/lib/libQtGui.so.4
#60 0xb67bd52a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#61 0xb67bd6ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#62 0xb67bfda5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#63 0xb6a4e767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#64 0xb7ffd8d6 in kdemain () from /usr/lib/libkdeinit4_plasma.so
#65 0x08048712 in _start ()