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 2.6.31-15-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I was opening an attachment (a Powerpoint doc) inside Gmail, and suddenly Plasma crashed. It didn't lock Firefox, Amarok, or any other app. I cannot reproduce the error.

 -- Backtrace:
Application: Área de trabajo de Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb76f2700 (LWP 1636))]

Thread 2 (Thread 0xac4b5b70 (LWP 1639)):
#0  0x001f9422 in __kernel_vsyscall ()
#1  0x00128e15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x072e478d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x00249e67 in QWaitConditionPrivate::wait (this=0x851d4e0, mutex=0x851d4dc, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0x851d4e0, mutex=0x851d4dc, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x011a4922 in QHostInfoAgent::run (this=0x851d4d0) at kernel/qhostinfo.cpp:260
#6  0x00248e32 in QThreadPrivate::start (arg=0x851d4d0) at thread/qthread_unix.cpp:188
#7  0x0012480e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x072d77ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb76f2700 (LWP 1636)):
[KCrash Handler]
#6  0x00c90d57 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#7  0x03c1f70e in qt_x11_getX11InfoForWindow (xinfo=0x86371f4, a=...) at kernel/qwidget_x11.cpp:400
#8  0x03c26b4e in QWidgetPrivate::create_sys (this=0x8637100, window=27437671, initializeWindow=true, destroyOldWindow=true) at kernel/qwidget_x11.cpp:545
#9  0x03be7b1c in QWidget::create (this=0x99033e0, window=27437671, initializeWindow=true, destroyOldWindow=<value optimized out>) at kernel/qwidget.cpp:1253
#10 0x01c12c1e in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x01c0e3f0 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#12 0x01c0e4cb in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#13 0x0034f263 in QMetaObject::activate (sender=0x8811110, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#14 0x0034fec2 in QMetaObject::activate (sender=0x8811110, m=0x429908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#15 0x00354387 in QSingleShotTimer::timeout (this=0x8811110) at .moc/release-shared/qtimer.moc:76
#16 0x0035449c in QSingleShotTimer::timerEvent (this=0x8811110) at kernel/qtimer.cpp:298
#17 0x003493bf in QObject::event (this=0x8811110, e=0xbf848390) at kernel/qobject.cpp:1075
#18 0x03b90f54 in QApplicationPrivate::notify_helper (this=0x82ab8f8, receiver=0x8811110, e=0xbf848390) at kernel/qapplication.cpp:4056
#19 0x03b9867c in QApplication::notify (this=0x82a5ae8, receiver=0x8811110, e=0xbf848390) at kernel/qapplication.cpp:3603
#20 0x00f6abfa in KApplication::notify (this=0x82a5ae8, receiver=0x8811110, event=0xbf848390) at ../../kdeui/kernel/kapplication.cpp:302
#21 0x003396cb in QCoreApplication::notifyInternal (this=0x82a5ae8, receiver=0x8811110, event=0xbf848390) at kernel/qcoreapplication.cpp:610
#22 0x003667ce in QCoreApplication::sendEvent (this=0x82ae0a4) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 QTimerInfoList::activateTimers (this=0x82ae0a4) at kernel/qeventdispatcher_unix.cpp:572
#24 0x003640e0 in timerSourceDispatch (source=0x82ae070) at kernel/qeventdispatcher_glib.cpp:165
#25 0x00810e78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#26 0x00814720 in ?? () from /lib/libglib-2.0.so.0
#27 0x00814853 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#28 0x0036402c in QEventDispatcherGlib::processEvents (this=0x82ab6e8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#29 0x03c31be5 in QGuiEventDispatcherGlib::processEvents (this=0x82ab6e8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#30 0x00337c79 in QEventLoop::processEvents (this=0xbf848654, flags=) at kernel/qeventloop.cpp:149
#31 0x003380ca in QEventLoop::exec (this=0xbf848654, flags=...) at kernel/qeventloop.cpp:201
#32 0x0033a53f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#33 0x03b90dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#34 0x018f880d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#35 0x0804dde1 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x824be30 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x80511a5 "0") at ../../kinit/kinit.cpp:677
#36 0x0804ea35 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#37 0x0804eeac in handle_requests (waitForPid=<value optimized out>) at ../../kinit/kinit.cpp:1362
#38 0x0804fbaf in main (argc=2, argv=0xbf848eb4, envp=0xbf848ec0) at ../../kinit/kinit.cpp:1793

Reported using DrKonqi