Version:            (using Devel)
Compiler:          g++ 4.3.2 
OS:                Linux
Installed from:    Compiled sources

After zooming out to see all the activities, plasma crashed with the following backtrace after clicking on the zoom in button of an activity. I'm having trouble reproducing it after the initial crash but I'll keep trying.

Application: Plasma Workspace (kdeinit), signal: Segmentation fault
[Current thread is 1 (Thread 0xb5fb6700 (LWP 3579))]

Thread 2 (Thread 0xa78ffb90 (LWP 3596)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb7dc0c35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7e20722 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#3  0xb76f1ae2 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7e1f70e in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7dbd1b5 in start_thread () from /lib/libpthread.so.0
#6  0xb66713be in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5fb6700 (LWP 3579)):
[KCrash Handler]
#6  0xb3adc7f2 in PlasmaApp::setControllerVisible (this=0x80b7730, show=false) at /home/josebur/kde/src/trunk/KDE/kdebase/workspace/plasma/shells/desktop/plasmaapp.cpp:953
#7  0xb3addb3a in PlasmaApp::zoomIn (this=0x80b7730, containment=0x842bf70) at /home/josebur/kde/src/trunk/KDE/kdebase/workspace/plasma/shells/desktop/plasmaapp.cpp:864
#8  0xb3addba2 in PlasmaApp::zoom (this=0x80b7730, containment=0x842bf70, direction=Plasma::ZoomIn) at /home/josebur/kde/src/trunk/KDE/kdebase/workspace/plasma/shells/desktop/plasmaapp.cpp:829
#9  0xb3ae309a in PlasmaApp::qt_metacall (this=0x80b7730, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbff47cc8)
    at /home/josebur/kde/build/trunk/KDE/kdebase/workspace/plasma/shells/desktop/plasmaapp.moc:111
#10 0xb7f29dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#11 0xb7f2b552 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#12 0xb5d34429 in Plasma::Containment::zoomRequested (this=0x842bf70, _t1=0x842bf70, _t2=Plasma::ZoomIn) at /home/josebur/kde/build/trunk/KDE/kdelibs/plasma/containment.moc:170
#13 0xb5d34b70 in Plasma::ContainmentPrivate::zoomIn (this=0x83c0600) at /home/josebur/kde/src/trunk/KDE/kdelibs/plasma/containment.cpp:1656
#14 0xb5d41470 in Plasma::Containment::qt_metacall (this=0x842bf70, _c=QMetaObject::InvokeMetaMethod, _id=23, _a=0xbff47e3c) at /home/josebur/kde/build/trunk/KDE/kdelibs/plasma/containment.moc:141
#15 0xa854789a in DefaultDesktop::qt_metacall (this=0x842bf70, _c=QMetaObject::InvokeMetaMethod, _id=58, _a=0xbff47e3c)
    at /home/josebur/kde/build/trunk/KDE/kdebase/workspace/plasma/containments/desktop/desktop.moc:78
#16 0xb7f29dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#17 0xb7f2a200 in QMetaObject::activate(QObject*, QMetaObject const*, int, int, void**) () from /usr/lib/libQtCore.so.4
#18 0xb6942021 in QAction::triggered(bool) () from /usr/lib/libQtGui.so.4
#19 0xb694359f in QAction::activate(QAction::ActionEvent) () from /usr/lib/libQtGui.so.4
#20 0xb69462e3 in QAction::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtGui.so.4
#21 0xb69a914a in QWidgetAction::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtGui.so.4
#22 0xb739195a in KAction::qt_metacall (this=0x83a56b8, _c=QMetaObject::InvokeMetaMethod, _id=12, _a=0xbff47fd8) at /home/josebur/kde/build/trunk/KDE/kdelibs/kdeui/kaction.moc:85
#23 0xb7f29dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#24 0xb7f2b552 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#25 0xb5dbb327 in Plasma::IconWidget::clicked (this=0x8266ae8) at /home/josebur/kde/build/trunk/KDE/kdelibs/plasma/iconwidget.moc:182
#26 0xb5dbcc48 in Plasma::IconWidget::mouseReleaseEvent (this=0x8266ae8, event=0xbff486d4) at /home/josebur/kde/src/trunk/KDE/kdelibs/plasma/widgets/iconwidget.cpp:1172
#27 0xb6f61b44 in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#28 0xb6fb1a4f in QGraphicsWidget::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#29 0xb6f870bc in ?? () from /usr/lib/libQtGui.so.4
#30 0xb6f8872a in ?? () from /usr/lib/libQtGui.so.4
#31 0xb6f92d91 in QGraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libQtGui.so.4
#32 0xb6f949ea in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#33 0xb694869c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#34 0xb695099e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#35 0xb74748fd in KApplication::notify (this=0x80b7730, receiver=0x819f740, event=0xbff486d4) at /home/josebur/kde/src/trunk/KDE/kdelibs/kdeui/kernel/kapplication.cpp:302
#36 0xb7f13adb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#37 0xb6fa6132 in QGraphicsView::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#38 0xb699f323 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#39 0xb6d5da63 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#40 0xb6dfdc3f in QAbstractScrollArea::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#41 0xb6fa6ea2 in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#42 0xb6e00245 in ?? () from /usr/lib/libQtGui.so.4
#43 0xb7f12cea in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#44 0xb694867a in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#45 0xb6951311 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#46 0xb74748fd in KApplication::notify (this=0x80b7730, receiver=0x867d548, event=0xbff48cd8) at /home/josebur/kde/src/trunk/KDE/kdelibs/kdeui/kernel/kapplication.cpp:302
#47 0xb7f13adb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#48 0xb695037e in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#49 0xb69c0506 in ?? () from /usr/lib/libQtGui.so.4
#50 0xb69bf8dd in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#51 0xb69e927a in ?? () from /usr/lib/libQtGui.so.4
#52 0xb64ee9c8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#53 0xb64f2083 in ?? () from /usr/lib/libglib-2.0.so.0
#54 0xb64f2241 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#55 0xb7f3f558 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#56 0xb69e8975 in ?? () from /usr/lib/libQtGui.so.4
#57 0xb7f120fa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#58 0xb7f1253a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#59 0xb7f149e9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#60 0xb6948517 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#61 0xb3ac7700 in kdemain (argc=1, argv=0x809fec0) at /home/josebur/kde/src/trunk/KDE/kdebase/workspace/plasma/shells/desktop/main.cpp:50
#62 0x0804e2f4 in launch (argc=1, _name=0x80b5234 "/home/josebur/kde/bin/plasma-desktop", args=0x80b5259 "", cwd=0x0, envc=0, envs=0x80b525d "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x8051142 "0") at /home/josebur/kde/src/trunk/KDE/kdelibs/kinit/kinit.cpp:672
#63 0x0804ea9d in handle_launcher_request (sock=7, who=<value optimized out>) at /home/josebur/kde/src/trunk/KDE/kdelibs/kinit/kinit.cpp:1164
#64 0x0804eefb in handle_requests (waitForPid=0) at /home/josebur/kde/src/trunk/KDE/kdelibs/kinit/kinit.cpp:1357
#65 0x0804f741 in main (argc=2, argv=0xbff4ae54, envp=0xbff4ae60) at /home/josebur/kde/src/trunk/KDE/kdelibs/kinit/kinit.cpp:1784