Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-16-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
There is not much to report. Plasma just quits at random times, sometimes it restarts and I get a crash report, sometimes the screen just stays black. I don't even have to be at computer. Sometimes crash report will be waiting for me when I get home.

I Think the crashes may be connected with CWP (Customizable weather plasmoid) and/or WebPAge subset widget. I think crashes don't happen when I don't have any of those two running. 

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
The current source language is "auto; currently c".
[Current thread is 1 (Thread 0x7ffabbf57750 (LWP 1950))]

Thread 4 (Thread 0x7ffa9ac1e910 (LWP 1951)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007ffabb9984fb in QWaitConditionPrivate::wait (this=<value optimized out>, mutex=0x184e0e8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x184e0e8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007ffab7dcb78c in QHostInfoAgent::run (this=0x184e0d0) at kernel/qhostinfo.cpp:260
#4  0x00007ffabb997445 in QThreadPrivate::start (arg=0x184e0d0) at thread/qthread_unix.cpp:188
#5  0x00007ffab8709a04 in start_thread (arg=<value optimized out>) at pthread_create.c:300
#6  0x00007ffab92e97bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7ffa86a9c910 (LWP 10236)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007ffabb996c93 in QMutexPrivate::wait (this=0x5ab1c50, timeout=-1) at thread/qmutex_unix.cpp:80
#2  0x00007ffabb992865 in QMutex::lock (this=0x47c6a98) at thread/qmutex.cpp:207
#3  0x00007ffa86ac800f in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#4  0x00007ffabb997445 in QThreadPrivate::start (arg=0x47c6a70) at thread/qthread_unix.cpp:188
#5  0x00007ffab8709a04 in start_thread (arg=<value optimized out>) at pthread_create.c:300
#6  0x00007ffab92e97bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()
The current source language is "auto; currently asm".

Thread 2 (Thread 0x7ffa8afd7910 (LWP 11810)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007ffabb996c93 in QMutexPrivate::wait (this=0x5ab1c50, timeout=-1) at thread/qmutex_unix.cpp:80
#2  0x00007ffabb992865 in QMutex::lock (this=0x47c6a98) at thread/qmutex.cpp:207
#3  0x00007ffa86ac720e in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#4  0x00007ffa86ac7fb2 in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#5  0x00007ffabb997445 in QThreadPrivate::start (arg=0x47c6a70) at thread/qthread_unix.cpp:188
#6  0x00007ffab8709a04 in start_thread (arg=<value optimized out>) at pthread_create.c:300
#7  0x00007ffab92e97bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ffabbf57750 (LWP 1950)):
[KCrash Handler]
#5  *__GI___libc_free (mem=0x4e004f00490053) at malloc.c:3687
#6  0x00007ffab9acf38a in ~QImageData (this=0x7ffa9401eca0, __in_chrg=<value optimized out>) at image/qimage.cpp:267
#7  0x00007ffab9acf49c in QImage::operator= (this=0x4812798, image=...) at image/qimage.cpp:1314
#8  0x00007ffa86ab63e4 in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#9  0x00007ffa86ae075d in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#10 0x00007ffa86aef129 in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#11 0x00007ffabba8d0f9 in QObject::event (this=0x48123e0, e=0x7ffa8000d040) at kernel/qobject.cpp:1111
#12 0x00007ffab9ffc11b in QGraphicsWidget::event (this=0x48123e0, event=0x7ffa8000d040) at graphicsview/qgraphicswidget.cpp:1340
#13 0x00007ffab9a29efc in QApplicationPrivate::notify_helper (this=0x10763d0, receiver=0x48123e0, e=0x7ffa8000d040) at kernel/qapplication.cpp:4056
#14 0x00007ffab9a311ce in QApplication::notify (this=0x106d1f0, receiver=0x48123e0, e=0x7ffa8000d040) at kernel/qapplication.cpp:4021
#15 0x00007ffaba660e56 in KApplication::notify (this=0x106d1f0, receiver=0x48123e0, event=0x7ffa8000d040) at ../../kdeui/kernel/kapplication.cpp:302
#16 0x00007ffabba7dc2c in QCoreApplication::notifyInternal (this=0x106d1f0, receiver=0x48123e0, event=0x7ffa8000d040) at kernel/qcoreapplication.cpp:610
#17 0x00007ffabba7e80a in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0xfde4d0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#18 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0xfde4d0) at kernel/qcoreapplication.cpp:1247
#19 0x00007ffabbaa6533 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#20 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#21 0x00007ffab895abbe in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#22 0x00007ffab895e588 in ?? () from /lib/libglib-2.0.so.0
#23 0x00007ffab895e6b0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#24 0x00007ffabbaa61a6 in QEventDispatcherGlib::processEvents (this=0xfe1040, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#25 0x00007ffab9abe4be in QGuiEventDispatcherGlib::processEvents (this=0x4e004f00490053, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#26 0x00007ffabba7c532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#27 0x00007ffabba7c904 in QEventLoop::exec (this=0x7fff647675b0, flags=) at kernel/qeventloop.cpp:201
#28 0x00007ffabba7eab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#29 0x00007ffaafdfb4cf in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../plasma/shells/desktop/main.cpp:50
#30 0x0000000000406da8 in launch (argc=1, _name=<value optimized out>, args=<value optimized out>, cwd=<value optimized out>, envc=0, envs=<value optimized out>, reset_env=false, tty=0x0, 
    avoid_loops=false, startup_id_str=0x40a299 "0") at ../../kinit/kinit.cpp:677
#31 0x0000000000407aa0 in handle_launcher_request (sock=8, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#32 0x0000000000407f51 in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1362
#33 0x0000000000408bb2 in main (argc=2, argv=<value optimized out>, envp=<value optimized out>) at ../../kinit/kinit.cpp:1793
The current source language is "auto; currently c".

Reported using DrKonqi