Application: plasma-desktop (0.3)
KDE Platform Version: 4.4.5 (KDE 4.4.5)
Qt Version: 4.6.3
Operating System: Linux 2.6.32.16-141.fc12.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
from the add widgets and then "Get new widgets" download "New Plasma Widgets", added several then closes the window on close the crash happened.
 

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7ff27796f880 (LWP 1922))]

Thread 2 (Thread 0x7ff2535bf710 (LWP 2515)):
#0  0x00007ff272717d5d in nanosleep () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007ff272717bd0 in __sleep (seconds=0) at ../sysdeps/unix/sysv/linux/sleep.c:138
#2  0x00007ff24a7f95dd in ggadget::smjs::TriggerOperationCallbacksThread (data=0x2588770) at js_script_runtime.cc:43
#3  0x00007ff273193a3a in start_thread (arg=0x7ff2535bf710) at pthread_create.c:297
#4  0x00007ff27275177d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ff27796f880 (LWP 1922)):
[KCrash Handler]
#5  0x0000000000000030 in ?? ()
#6  0x00007ff2519a6901 in SetUpFont (this=0x2559278, width=0x7fffa7032a28, height=0x7fffa7032a20) at text_frame.cc:91
#7  (anonymous namespace)::TextFrame::GetSimpleExtents (this=0x2559278, width=0x7fffa7032a28, height=0x7fffa7032a20) at text_frame.cc:381
#8  0x00007ff2518f8519 in (anonymous namespace)::ButtonElement::GetDefaultSize (this=0x26248a0, width=0x7fffa7032b10, height=0x7fffa7032b18) at button_element.cc:356
#9  0x00007ff2518ef63d in Layout (this=<value optimized out>) at basic_element.cc:440
#10 (anonymous namespace)::BasicElement::Layout (this=<value optimized out>) at basic_element.cc:1848
#11 0x00007ff25192720e in Layout (this=<value optimized out>) at elements.cc:367
#12 (anonymous namespace)::Elements::Layout (this=<value optimized out>) at elements.cc:645
#13 0x00007ff2518ef49b in Layout (this=<value optimized out>) at basic_element.cc:519
#14 (anonymous namespace)::BasicElement::Layout (this=<value optimized out>) at basic_element.cc:1848
#15 0x00007ff251922344 in (anonymous namespace)::DivElement::Layout (this=0x224f190) at div_element.cc:80
#16 0x00007ff25192720e in Layout (this=<value optimized out>) at elements.cc:367
#17 (anonymous namespace)::Elements::Layout (this=<value optimized out>) at elements.cc:645
#18 0x00007ff2518ef49b in Layout (this=<value optimized out>) at basic_element.cc:519
#19 (anonymous namespace)::BasicElement::Layout (this=<value optimized out>) at basic_element.cc:1848
#20 0x00007ff251922344 in (anonymous namespace)::DivElement::Layout (this=0x224ef28) at div_element.cc:80
#21 0x00007ff25192720e in Layout (this=<value optimized out>) at elements.cc:367
#22 (anonymous namespace)::Elements::Layout (this=<value optimized out>) at elements.cc:645
#23 0x00007ff2519b8023 in Layout (this=<value optimized out>) at view.cc:1151
#24 (anonymous namespace)::View::Layout (this=<value optimized out>) at view.cc:1803
#25 0x00007ff251cebcb7 in ggadget::qt::QtViewWidget::timerEvent (this=0x269ccb0, event=<value optimized out>) at qt_view_widget.cc:554
#26 0x00007ff27350b99e in QObject::event (this=0x269ccb0, e=0x7fffa7033bd0) at kernel/qobject.cpp:1212
#27 0x00007ff273c72b7f in QWidget::event (this=0x269ccb0, event=0x7fffa7033bd0) at kernel/qwidget.cpp:8501
#28 0x00007ff273c2836c in QApplicationPrivate::notify_helper (this=0x10fd270, receiver=0x269ccb0, e=0x7fffa7033bd0) at kernel/qapplication.cpp:4306
#29 0x00007ff273c2e73b in QApplication::notify (this=<value optimized out>, receiver=0x269ccb0, e=0x7fffa7033bd0) at kernel/qapplication.cpp:4189
#30 0x00007ff2751a0ac6 in KApplication::notify (this=0x10eb440, receiver=0x269ccb0, event=0x7fffa7033bd0) at /usr/src/debug/kdelibs-4.4.5/kdeui/kernel/kapplication.cpp:302
#31 0x00007ff2734fc9cc in QCoreApplication::notifyInternal (this=0x10eb440, receiver=0x269ccb0, event=0x7fffa7033bd0) at kernel/qcoreapplication.cpp:726
#32 0x00007ff273525182 in sendEvent (this=0x11009c0) at kernel/qcoreapplication.h:215
#33 QTimerInfoList::activateTimers (this=0x11009c0) at kernel/qeventdispatcher_unix.cpp:603
#34 0x00007ff273522728 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#35 idleTimerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#36 0x000000331b03923e in g_main_dispatch (context=0x10ff920) at gmain.c:1960
#37 IA__g_main_context_dispatch (context=0x10ff920) at gmain.c:2513
#38 0x000000331b03cc28 in g_main_context_iterate (context=0x10ff920, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:2591
#39 0x000000331b03cd4a in IA__g_main_context_iteration (context=0x10ff920, may_block=1) at gmain.c:2654
#40 0x00007ff2735223f3 in QEventDispatcherGlib::processEvents (this=0x10d2f90, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#41 0x00007ff273cc786e in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#42 0x00007ff2734fb412 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#43 0x00007ff2734fb6dc in QEventLoop::exec (this=0x7fffa7033e70, flags=...) at kernel/qeventloop.cpp:201
#44 0x00007ff2734fedab in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1003
#45 0x00007ff277688e52 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.4.5/plasma/desktop/shell/main.cpp:112
#46 0x00007ff272691b1d in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fffa70341f8) at libc-start.c:226
#47 0x00000000004007c9 in _start ()

Reported using DrKonqi