Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-17-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
before a installation of plasmoid screen is black for few minutes and go back. no changes wallpaper or any icon or plasmoid. 

 -- Backtrace:
Application: Área de trabajo de Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb76fe700 (LWP 1512))]

Thread 2 (Thread 0xac4c1b70 (LWP 1515)):
#0  0x0040b422 in __kernel_vsyscall ()
#1  0x00b62e15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x0085b87d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x0015fe67 in QWaitConditionPrivate::wait (this=0xa0ef0a8, mutex=0xa0ef0a4, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0xa0ef0a8, mutex=0xa0ef0a4, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x02db2922 in QHostInfoAgent::run (this=0xa0ef098) at kernel/qhostinfo.cpp:260
#6  0x0015ee32 in QThreadPrivate::start (arg=0xa0ef098) at thread/qthread_unix.cpp:188
#7  0x00b5e80e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x0084e8de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb76fe700 (LWP 1512)):
[KCrash Handler]
#6  0x00000000 in ?? ()
#7  0x014252fc in KNS::Engine::downloadDialog (this=0xa9df6c8, receiver=0x9e64888, slot=0x845d538 "1widgetBrowserFinished()") at ../../../knewstuff/knewstuff2/engine.cpp:230
#8  0x0837a024 in Plasma::PlasmoidPackage::createNewWidgetBrowser (this=0x9e64888, parent=0xa9e2178) at ../../plasma/private/packages.cpp:84
#9  0x01671a73 in Plasma::AppletBrowserWidget::downloadWidgets (this=0xa9e2178, type=...) at ../../../../plasma/shells/common/appletbrowser.cpp:412
#10 0x01674f1d in Plasma::AppletBrowserWidget::qt_metacall (this=0xa9e2178, _c=QMetaObject::InvokeMetaMethod, _id=29, _a=0xbfd46188) at ./appletbrowser.moc:82
#11 0x00265263 in QMetaObject::activate (sender=0xacb2d60, from_signal_index=5, to_signal_index=5, argv=0xbfd46188) at kernel/qobject.cpp:3113
#12 0x00265ec2 in QMetaObject::activate (sender=0xacb2d60, m=0x33f878, local_signal_index=1, argv=0xbfd46188) at kernel/qobject.cpp:3187
#13 0x00267e23 in QSignalMapper::mapped (this=0xacb2d60, _t1=...) at .moc/release-shared/moc_qsignalmapper.cpp:102
#14 0x0026875d in QSignalMapper::map (this=0xacb2d60, sender=0xa5ac4d8) at kernel/qsignalmapper.cpp:268
#15 0x002688ee in QSignalMapper::map (this=0xacb2d60) at kernel/qsignalmapper.cpp:257
#16 0x0026912b in QSignalMapper::qt_metacall (this=0xacb2d60, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfd46358) at .moc/release-shared/moc_qsignalmapper.cpp:81
#17 0x00265263 in QMetaObject::activate (sender=0xa5ac4d8, from_signal_index=5, to_signal_index=6, argv=0xbfd46358) at kernel/qobject.cpp:3113
#18 0x002656d8 in QMetaObject::activate (sender=0xa5ac4d8, m=0x21e9e48, from_local_signal_index=1, to_local_signal_index=2, argv=0xbfd46358) at kernel/qobject.cpp:3207
#19 0x019819b1 in QAction::triggered (this=0xa5ac4d8, _t1=false) at .moc/release-shared/moc_qaction.cpp:236
#20 0x01982f32 in QAction::activate (this=0xa5ac4d8, event=QAction::Trigger) at kernel/qaction.cpp:1160
#21 0x01dd09cc in QMenuPrivate::activateCausedStack (this=0xaa37f68, causedStack=..., action=0xa5ac4d8, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:967
#22 0x01dd703b in QMenuPrivate::activateAction (this=0xaa37f68, action=0xa5ac4d8, action_e=QAction::Trigger, self=<value optimized out>) at widgets/qmenu.cpp:1060
#23 0x01dd7bf7 in QMenu::mouseReleaseEvent (this=0xa2a27e8, e=0xbfd46ab0) at widgets/qmenu.cpp:2254
#24 0x012751c5 in KMenu::mouseReleaseEvent (this=0xa2a27e8, e=0xbfd46ab0) at ../../kdeui/widgets/kmenu.cpp:456
#25 0x019dd012 in QWidget::event (this=0xa2a27e8, event=0xbfd46ab0) at kernel/qwidget.cpp:7549
#26 0x01dd9e34 in QMenu::event (this=0xa2a27e8, e=0xbfd46ab0) at widgets/qmenu.cpp:2353
#27 0x01987f54 in QApplicationPrivate::notify_helper (this=0x9c1c960, receiver=0xa2a27e8, e=0xbfd46ab0) at kernel/qapplication.cpp:4056
#28 0x01990033 in QApplication::notify (this=0x9c16b50, receiver=0xa2a27e8, e=0xbfd46ab0) at kernel/qapplication.cpp:3758
#29 0x0118abfa in KApplication::notify (this=0x9c16b50, receiver=0xa2a27e8, event=0xbfd46ab0) at ../../kdeui/kernel/kapplication.cpp:302
#30 0x0024f6cb in QCoreApplication::notifyInternal (this=0x9c16b50, receiver=0xa2a27e8, event=0xbfd46ab0) at kernel/qcoreapplication.cpp:610
#31 0x0198ef6e in QCoreApplication::sendSpontaneousEvent (receiver=0xa2a27e8, event=0xbfd46ab0, alienWidget=0x0, nativeWidget=0xa2a27e8, buttonDown=0x2202aa0, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#32 QApplicationPrivate::sendMouseEvent (receiver=0xa2a27e8, event=0xbfd46ab0, alienWidget=0x0, nativeWidget=0xa2a27e8, buttonDown=0x2202aa0, lastMouseReceiver=...) at kernel/qapplication.cpp:2924
#33 0x019fdc87 in QETWidget::translateMouseEvent (this=0xa2a27e8, event=0xbfd480fc) at kernel/qapplication_x11.cpp:4343
#34 0x019fcc4b in QApplication::x11ProcessEvent (this=0x9c16b50, event=0xbfd480fc) at kernel/qapplication_x11.cpp:3428
#35 0x01a29502 in x11EventSourceDispatch (s=0x9c1f500, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#36 0x00e45e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#37 0x00e49730 in ?? () from /lib/libglib-2.0.so.0
#38 0x00e49863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#39 0x0027a02c in QEventDispatcherGlib::processEvents (this=0x9c1c750, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#40 0x01a28be5 in QGuiEventDispatcherGlib::processEvents (this=0x9c1c750, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#41 0x0024dc79 in QEventLoop::processEvents (this=0xbfd483f0, flags=) at kernel/qeventloop.cpp:149
#42 0x0024e0ca in QEventLoop::exec (this=0xbfd483f0, flags=...) at kernel/qeventloop.cpp:201
#43 0x01dd9c9e in QMenu::exec (this=0xa2a27e8, p=..., action=0x0) at widgets/qmenu.cpp:1993
#44 0x01de61d5 in QPushButtonPrivate::_q_popupPressed (this=0xa697600) at widgets/qpushbutton.cpp:611
#45 0x01de7820 in QPushButton::qt_metacall (this=0xa4ee878, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0xbfd4858c) at .moc/release-shared/moc_qpushbutton.cpp:74
#46 0x0128310a in KPushButton::qt_metacall (this=0xa4ee878, _c=QMetaObject::InvokeMetaMethod, _id=40, _a=0xbfd4858c) at ./kpushbutton.moc:70
#47 0x00265263 in QMetaObject::activate (sender=0xa4ee878, from_signal_index=27, to_signal_index=27, argv=0x0) at kernel/qobject.cpp:3113
#48 0x00265ec2 in QMetaObject::activate (sender=0xa4ee878, m=0x21fb0a4, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#49 0x02014c67 in QAbstractButton::pressed (this=0xa4ee878) at .moc/release-shared/moc_qabstractbutton.cpp:187
#50 0x01d3d0f9 in QAbstractButtonPrivate::emitPressed (this=0xa697600) at widgets/qabstractbutton.cpp:557
#51 0x01d3d2f1 in QAbstractButton::mousePressEvent (this=0xa4ee878, e=0xbfd48bb0) at widgets/qabstractbutton.cpp:1092
#52 0x01282d41 in KPushButton::mousePressEvent (this=0xacb1fa8, e=0x1) at ../../kdeui/widgets/kpushbutton.cpp:226
#53 0x019dcff6 in QWidget::event (this=0xa4ee878, event=0xbfd48bb0) at kernel/qwidget.cpp:7545
#54 0x01d3d3ee in QAbstractButton::event (this=0xa4ee878, e=0x1) at widgets/qabstractbutton.cpp:1077
#55 0x01de766d in QPushButton::event (this=0xa4ee878, e=0xbfd48bb0) at widgets/qpushbutton.cpp:662
#56 0x01987f54 in QApplicationPrivate::notify_helper (this=0x9c1c960, receiver=0xa4ee878, e=0xbfd48bb0) at kernel/qapplication.cpp:4056
#57 0x01990033 in QApplication::notify (this=0x9c16b50, receiver=0xa4ee878, e=0xbfd48bb0) at kernel/qapplication.cpp:3758
#58 0x0118abfa in KApplication::notify (this=0x9c16b50, receiver=0xa4ee878, event=0xbfd48bb0) at ../../kdeui/kernel/kapplication.cpp:302
#59 0x0024f6cb in QCoreApplication::notifyInternal (this=0x9c16b50, receiver=0xa4ee878, event=0xbfd48bb0) at kernel/qcoreapplication.cpp:610
#60 0x0198ef6e in QCoreApplication::sendSpontaneousEvent (receiver=0xa4ee878, event=0xbfd48bb0, alienWidget=0xa4ee878, nativeWidget=0xaa745c0, buttonDown=0x2202aa0, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#61 QApplicationPrivate::sendMouseEvent (receiver=0xa4ee878, event=0xbfd48bb0, alienWidget=0xa4ee878, nativeWidget=0xaa745c0, buttonDown=0x2202aa0, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#62 0x019fd7c0 in QETWidget::translateMouseEvent (this=0xaa745c0, event=0xbfd4a1fc) at kernel/qapplication_x11.cpp:4409
#63 0x019fcc4b in QApplication::x11ProcessEvent (this=0x9c16b50, event=0xbfd4a1fc) at kernel/qapplication_x11.cpp:3428
#64 0x01a29502 in x11EventSourceDispatch (s=0x9c1f500, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#65 0x00e45e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#66 0x00e49730 in ?? () from /lib/libglib-2.0.so.0
#67 0x00e49863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#68 0x0027a02c in QEventDispatcherGlib::processEvents (this=0x9c1c750, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#69 0x01a28be5 in QGuiEventDispatcherGlib::processEvents (this=0x9c1c750, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#70 0x0024dc79 in QEventLoop::processEvents (this=0xbfd4a4f4, flags=) at kernel/qeventloop.cpp:149
#71 0x0024e0ca in QEventLoop::exec (this=0xbfd4a4f4, flags=...) at kernel/qeventloop.cpp:201
#72 0x0025053f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#73 0x01987dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#74 0x0164e80d in kdemain (argc=1, argv=0x9b9f1e8) at ../../../../plasma/shells/desktop/main.cpp:50
#75 0x0804dde1 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x9bc2670 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x80511a5 "0") at ../../kinit/kinit.cpp:677
#76 0x0804ea35 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#77 0x0804eeac in handle_requests (waitForPid=<value optimized out>) at ../../kinit/kinit.cpp:1362
#78 0x0804fbaf in main (argc=2, argv=0xbfd4ad54, envp=0xbfd4ad60) at ../../kinit/kinit.cpp:1793

Reported using DrKonqi