Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
using nightly builds, opengl compiz builds

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 4007)]

Thread 2 (Thread 0x7fbabe389950 (LWP 4010)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007fbadd3bfd19 in QWaitCondition::wait (this=0x14dc840, mutex=0x14dc838, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007fbadc24981c in QHostInfoAgent::run (this=0x14dc820) at kernel/qhostinfo.cpp:260
#3  0x00007fbadd3bed35 in QThreadPrivate::start (arg=0x14dc820) at thread/qthread_unix.cpp:188
#4  0x00007fbad92b83ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007fbad9e9cfcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fbadd97e750 (LWP 4007)):
[KCrash Handler]
#5  0x00007fbadb012ad4 in QGraphicsItem::isWidget (this=0x11cc480) at graphicsview/qgraphicsitem.cpp:1142
#6  0x00007fbadb015279 in QGraphicsItem::isWindow (this=0x11cc480) at graphicsview/qgraphicsitem.cpp:1156
#7  0x00007fbadb04bdf1 in QGraphicsScene::event (this=0xcac260, event=0x7fffe59b9860) at graphicsview/qgraphicsscene.cpp:3850
#8  0x00007fbadaa73f4d in QApplicationPrivate::notify_helper (this=0xbc8980, receiver=0xcac260, e=0x7fffe59ba8e0) at kernel/qapplication.cpp:4056
#9  0x00007fbadaa7c18a in QApplication::notify (this=0xb879d0, receiver=0xcac260, e=0x7fffe59ba8e0) at kernel/qapplication.cpp:4021
#10 0x00007fbadbb8671b in KApplication::notify (this=0xb879d0, receiver=0xcac260, event=0x7fffe59ba8e0) at /build/buildd/kde4libs-4.3.0/kdeui/kernel/kapplication.cpp:302
#11 0x00007fbadd4a86ac in QCoreApplication::notifyInternal (this=0xb879d0, receiver=0xcac260, event=0x7fffe59ba8e0) at kernel/qcoreapplication.cpp:610
#12 0x00007fbadb05c3d6 in QGraphicsView::viewportEvent (this=0x1290cc0, event=0x7fffe59ba8e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#13 0x00007fbadd4a79b8 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x127c530, event=0x7fffe59ba8e0) at kernel/qcoreapplication.cpp:726
#14 0x00007fbadaa73f1c in QApplicationPrivate::notify_helper (this=0xbc8980, receiver=0x127c530, e=0x7fffe59ba8e0) at kernel/qapplication.cpp:4052
#15 0x00007fbadaa7c18a in QApplication::notify (this=0xb879d0, receiver=0x127c530, e=0x7fffe59ba8e0) at kernel/qapplication.cpp:4021
#16 0x00007fbadbb8671b in KApplication::notify (this=0xb879d0, receiver=0x127c530, event=0x7fffe59ba8e0) at /build/buildd/kde4libs-4.3.0/kdeui/kernel/kapplication.cpp:302
#17 0x00007fbadd4a86ac in QCoreApplication::notifyInternal (this=0xb879d0, receiver=0x127c530, event=0x7fffe59ba8e0) at kernel/qcoreapplication.cpp:610
#18 0x00007fbadaac522a in QWidget::event (this=0x1290cc0, event=0x7fffe59ba8e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#19 0x00007fbadae37f0b in QFrame::event (this=0x1290cc0, e=0x7fffe59ba8e0) at widgets/qframe.cpp:559
#20 0x00007fbadaec9639 in QAbstractScrollArea::event (this=0x1290cc0, e=0x7fffe59ba8e0) at widgets/qabstractscrollarea.cpp:918
#21 0x00007fbadaa73f4d in QApplicationPrivate::notify_helper (this=0xbc8980, receiver=0x1290cc0, e=0x7fffe59ba8e0) at kernel/qapplication.cpp:4056
#22 0x00007fbadaa7c18a in QApplication::notify (this=0xb879d0, receiver=0x1290cc0, e=0x7fffe59ba8e0) at kernel/qapplication.cpp:4021
#23 0x00007fbadbb8671b in KApplication::notify (this=0xb879d0, receiver=0x1290cc0, event=0x7fffe59ba8e0) at /build/buildd/kde4libs-4.3.0/kdeui/kernel/kapplication.cpp:302
#24 0x00007fbadd4a86ac in QCoreApplication::notifyInternal (this=0xb879d0, receiver=0x1290cc0, event=0x7fffe59ba8e0) at kernel/qcoreapplication.cpp:610
#25 0x00007fbadaa7acb8 in QApplication::setActiveWindow (act=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#26 0x00007fbadaae45c0 in QApplication::x11ProcessEvent (this=0xb879d0, event=0x7fffe59bc210) at kernel/qapplication_x11.cpp:3469
#27 0x00007fbadab0d454 in x11EventSourceDispatch (s=0xbcc2e0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#28 0x00007fbad950720a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#29 0x00007fbad950a8e0 in ?? () from /usr/lib/libglib-2.0.so.0
#30 0x00007fbad950aa7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#31 0x00007fbadd4d1a8f in QEventDispatcherGlib::processEvents (this=0xbc8270, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#32 0x00007fbadab0cbdf in QGuiEventDispatcherGlib::processEvents (this=0x11cc480, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#33 0x00007fbadd4a6f42 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -442776320}) at kernel/qeventloop.cpp:149
#34 0x00007fbadd4a7314 in QEventLoop::exec (this=0x7fffe59bc540, flags={i = -442776240}) at kernel/qeventloop.cpp:201
#35 0x00007fbadd4a95e4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#36 0x00007fbad13051eb in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#37 0x0000000000407215 in launch (argc=1, _name=0xb4f418 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0xb4f438 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a3a1 "0") at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:676
#38 0x0000000000407a38 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:1168
#39 0x0000000000407fe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:1361
#40 0x0000000000408b26 in main (argc=2, argv=0x7fffe59bd3e8, envp=0x7fffe59bd400) at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:1788

Reported using DrKonqi