Application that crashed: plasma-desktop.kde4.old
Version of the application: 0.3
KDE Version: 4.2.95 (KDE 4.2.95 (KDE 4.3 RC1))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-13-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
The system was idle and then when I came in the next morning the desktop had crashed.  I don't have much more information than this.

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop.kde4.old), signal: Segmentation fault
[Current thread is 0 (LWP 15531)]

Thread 2 (Thread 0x7f891170b950 (LWP 15534)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f892d3ee939 in QWaitCondition::wait (this=0x25a4510, mutex=0x25a4508, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f89309b24cc in QHostInfoAgent::run (this=0x25a44f0) at kernel/qhostinfo.cpp:260
#3  0x00007f892d3ed952 in QThreadPrivate::start (arg=0x25a44f0) at thread/qthread_unix.cpp:189
#4  0x00007f8929b7a3ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f892c94afcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f8931fa9790 (LWP 15531)):
[KCrash Handler]
#5  0x00007f892dcef87f in QX11PixmapData::toImage (this=0x2b01200) at image/qpixmap_x11.cpp:1579
#6  0x00007f892dceff09 in QX11PixmapData::transformed (this=0x2b01200, transform=@0x7fff3a0e6bc0, mode=Qt::SmoothTransformation) at image/qpixmap_x11.cpp:1720
#7  0x00007f892dcdf5a0 in QPixmap::transformed (this=0x7fff3a0e6d70, transform=@0x7fff3a0e6bc0, mode=Qt::SmoothTransformation) at image/qpixmap.cpp:1490
#8  0x00007f892dcdf950 in QPixmap::scaled (this=0x7fff3a0e6d70, s=<value optimized out>, aspectMode=<value optimized out>, mode=Qt::SmoothTransformation) at image/qpixmap.cpp:1404
#9  0x00007f892dcb8e91 in QPixmapIconEngine::pixmap (this=<value optimized out>, size=<value optimized out>, mode=QIcon::Normal, state=QIcon::Off) at image/qicon.cpp:327
#10 0x00007f892dcb6731 in QPixmapIconEngine::paint (this=<value optimized out>, painter=0x7fff3a0e8630, rect=@0x7fff3a0e6fd0, mode=QIcon::Normal, state=QIcon::On) at image/qicon.cpp:184
#11 0x00007f892dcb6538 in QIcon::paint (this=0x33aa190, painter=0x7fff3a0e8630, rect=@0x7fff3a0e72c0, alignment={i = 974025664}, mode=QIcon::Normal, state=QIcon::Off) at image/qicon.cpp:759
#12 0x00007f8914e778ea in ?? () from /usr/lib/kde4/plasma_applet_tasks.so
#13 0x00007f892e202d15 in _q_paintItem (item=<value optimized out>, painter=0x7fff3a0e8630, option=0x28c50b0, widget=0x27015d0, useWindowOpacity=true, painterStateProtection=true)
    at graphicsview/qgraphicsscene.cpp:4483
#14 0x00007f892e204408 in QGraphicsScenePrivate::drawItemHelper (this=<value optimized out>, item=0x33aa140, painter=0x7fff3a0e8630, option=0x28c50b0, widget=0x27015d0, painterStateProtection=true)
    at graphicsview/qgraphicsscene.cpp:4552
#15 0x00007f892e20651e in QGraphicsScene::drawItems (this=<value optimized out>, painter=0x7fff3a0e8630, numItems=42, items=<value optimized out>, options=0x28c4ba0, widget=0x27015d0)
    at graphicsview/qgraphicsscene.cpp:4957
#16 0x00007f892e228260 in QGraphicsView::paintEvent (this=0x25c8070, event=<value optimized out>) at graphicsview/qgraphicsview.cpp:3542
#17 0x00007f8931c8c706 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#18 0x00007f892dc6c6e6 in QWidget::event (this=0x25c8070, event=0x7fff3a0e8e00) at kernel/qwidget.cpp:7654
#19 0x00007f892e00640b in QFrame::event (this=0x25c8070, e=0x7fff3a0e8e00) at widgets/qframe.cpp:559
#20 0x00007f892e222d1b in QGraphicsView::viewportEvent (this=0x25c8070, event=0x7fff3a0e8e00) at graphicsview/qgraphicsview.cpp:2933
#21 0x00007f892d4d5a68 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x27015d0, event=0x7fff3a0e8e00) at kernel/qcoreapplication.cpp:718
#22 0x00007f892dc1b75c in QApplicationPrivate::notify_helper (this=0x1cea7b0, receiver=0x27015d0, e=0x7fff3a0e8e00) at kernel/qapplication.cpp:4080
#23 0x00007f892dc2397a in QApplication::notify (this=0x1cdc600, receiver=0x27015d0, e=0x7fff3a0e8e00) at kernel/qapplication.cpp:4049
#24 0x00007f89302ea62b in KApplication::notify (this=0x1cdc600, receiver=0x27015d0, event=0x7fff3a0e8e00) at /build/buildd/kde4libs-4.2.95/kdeui/kernel/kapplication.cpp:302
#25 0x00007f892d4d675c in QCoreApplication::notifyInternal (this=0x1cdc600, receiver=0x27015d0, event=0x7fff3a0e8e00) at kernel/qcoreapplication.cpp:602
#26 0x00007f892dc739a5 in QWidgetPrivate::drawWidget (this=0x28a9bf0, pdev=0x26ff798, rgn=@0x7fff3a0e9030, offset=@0x7fff3a0e9020, flags=4, sharedPainter=0x0, backingStore=0x25c9790)
    at kernel/qwidget.cpp:5046
#27 0x00007f892dc74117 in QWidgetPrivate::paintSiblingsRecursive (this=0x25cd0b0, pdev=0x26ff798, siblings=@0x25cd0c8, index=2, rgn=@0x7fff3a0e9120, offset=@0x25c97d4, flags=4, sharedPainter=0x0, 
    backingStore=0x25c9790) at kernel/qwidget.cpp:5156
#28 0x00007f892dc74026 in QWidgetPrivate::paintSiblingsRecursive (this=0x25cd0b0, pdev=0x26ff798, siblings=@0x25cd0c8, index=4, rgn=@0x7fff3a0e9210, offset=@0x25c97d4, flags=4, sharedPainter=0x0, 
    backingStore=0x25c9790) at kernel/qwidget.cpp:5147
#29 0x00007f892dc74026 in QWidgetPrivate::paintSiblingsRecursive (this=0x25cd0b0, pdev=0x26ff798, siblings=@0x25cd0c8, index=5, rgn=@0x7fff3a0e9300, offset=@0x25c97d4, flags=4, sharedPainter=0x0, 
    backingStore=0x25c9790) at kernel/qwidget.cpp:5147
#30 0x00007f892dc74026 in QWidgetPrivate::paintSiblingsRecursive (this=0x25cd0b0, pdev=0x26ff798, siblings=@0x25cd0c8, index=6, rgn=@0x7fff3a0e9770, offset=@0x25c97d4, flags=4, sharedPainter=0x0, 
    backingStore=0x25c9790) at kernel/qwidget.cpp:5147
#31 0x00007f892dc73617 in QWidgetPrivate::drawWidget (this=0x25cd0b0, pdev=0x26ff798, rgn=@0x7fff3a0e9770, offset=@0x25c97d4, flags=4, sharedPainter=0x0, backingStore=0x25c9790)
    at kernel/qwidget.cpp:5095
#32 0x00007f892de17362 in QWidgetBackingStore::sync (this=0x25c9790) at painting/qbackingstore.cpp:1266
#33 0x00007f892dc65050 in QWidgetPrivate::syncBackingStore (this=0x25cd0b0) at kernel/qwidget.cpp:1603
#34 0x00007f892dc6c57d in QWidget::event (this=0x25c8070, event=0x34d0910) at kernel/qwidget.cpp:7794
#35 0x00007f892e00640b in QFrame::event (this=0x25c8070, e=0x34d0910) at widgets/qframe.cpp:559
#36 0x00007f892e097949 in QAbstractScrollArea::event (this=0x25c8070, e=0x34d0910) at widgets/qabstractscrollarea.cpp:918
#37 0x00007f8931c8e110 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#38 0x00007f892dc1b78d in QApplicationPrivate::notify_helper (this=0x1cea7b0, receiver=0x25c8070, e=0x34d0910) at kernel/qapplication.cpp:4084
#39 0x00007f892dc2397a in QApplication::notify (this=0x1cdc600, receiver=0x25c8070, e=0x34d0910) at kernel/qapplication.cpp:4049
#40 0x00007f89302ea62b in KApplication::notify (this=0x1cdc600, receiver=0x25c8070, event=0x34d0910) at /build/buildd/kde4libs-4.2.95/kdeui/kernel/kapplication.cpp:302
#41 0x00007f892d4d675c in QCoreApplication::notifyInternal (this=0x1cdc600, receiver=0x25c8070, event=0x34d0910) at kernel/qcoreapplication.cpp:602
#42 0x00007f892d4d73ca in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x1cca950) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#43 0x00007f892d5001e3 in postEventSourceDispatch (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#44 0x00007f8927f4a20a in IA__g_main_context_dispatch (context=0x1cebd70) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:1814
#45 0x00007f8927f4d8e0 in g_main_context_iterate (context=0x1cebd70, block=1, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2448
#46 0x00007f8927f4da7c in IA__g_main_context_iteration (context=0x1cebd70, may_block=1) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#47 0x00007f892d4ffe6f in QEventDispatcherGlib::processEvents (this=0x1ceb890, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#48 0x00007f892dcb3bef in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#49 0x00007f892d4d5002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 974037760}) at kernel/qeventloop.cpp:149
#50 0x00007f892d4d53cd in QEventLoop::exec (this=0x7fff3a0ea340, flags={i = 974037840}) at kernel/qeventloop.cpp:200
#51 0x00007f892d4d7694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#52 0x00007f8931c8463b in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#53 0x00007f892c8835a6 in __libc_start_main (main=0x400890 <_start+240>, argc=1, ubp_av=0x7fff3a0ea648, init=0x4008c0 <__libc_csu_init>, fini=<value optimized out>, rtld_fini=<value optimized out>, 
    stack_end=0x7fff3a0ea638) at libc-start.c:220
#54 0x00000000004007c9 in _start ()

Reported using DrKonqi