Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-14-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
"Clicked in opendesktop.org-Plasmoid on Nearby --> Contact --> User Details and then on the "Home-Button" (to get my own Details back). --> Workspace crashed at clicking on the Home-Button" 
----------------
I'm confirm this bug - I have exactly the same.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 3374)]

Thread 2 (Thread 0xa82b8b90 (LWP 3377)):
#0  0xb7f89430 in __kernel_vsyscall ()
#1  0xb64a40e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb66842ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7d8a172 in QWaitCondition::wait (this=0x9005d78, mutex=0x9005d74, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  0xb76c7ac2 in QHostInfoAgent::run (this=0x9005d68) at kernel/qhostinfo.cpp:260
#5  0xb7d89132 in QThreadPrivate::start (arg=0x9005d68) at thread/qthread_unix.cpp:188
#6  0xb64a04ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb667549e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5fada10 (LWP 3374)):
[KCrash Handler]
#6  QGraphicsItemPrivate::updateCachedClipPathFromSetPosHelper (this=0x9e34688, newPos=@0xbfea47d0) at graphicsview/qgraphicsitem.cpp:3910
#7  0xb6f4e1c5 in QGraphicsItemPrivate::setPosHelper (this=0x9e34688, pos=@0xbfea4930) at graphicsview/qgraphicsitem.cpp:2372
#8  0xb6f99218 in QGraphicsWidget::setGeometry (this=0x9b93c78, rect=@0xbfea4a50) at graphicsview/qgraphicswidget.cpp:382
#9  0xb6fa06cb in QGridLayoutItem::setGeometry (this=0x9e7b2f8, rect=@0xbfea4a50) at graphicsview/qgridlayoutengine.cpp:650
#10 0xb6fa66d2 in QGridLayoutEngine::setGeometries (this=0x8f1dc28, styleInfo=@0xbfea4adc, contentsGeometry=@0xbfea4ab8) at graphicsview/qgridlayoutengine.cpp:1030
#11 0xb6f94d44 in QGraphicsLinearLayout::setGeometry (this=0x8f00ba0, rect=@0xbfea4b38) at graphicsview/qgraphicslinearlayout.cpp:503
#12 0xb6f91ddf in QGraphicsLayout::activate (this=0x8f00ba0) at graphicsview/qgraphicslayout.cpp:269
#13 0xb6f91e5c in QGraphicsLayout::widgetEvent (this=0x8f00ba0, e=0x9b8b8a0) at graphicsview/qgraphicslayout.cpp:366
#14 0xb6f985e3 in QGraphicsWidget::event (this=0x8e96d60, event=0x9b8b8a0) at graphicsview/qgraphicswidget.cpp:1262
#15 0xb693ad3c in QApplicationPrivate::notify_helper (this=0x89ad7e8, receiver=0x8e96d60, e=0x9b8b8a0) at kernel/qapplication.cpp:4056
#16 0xb694303e in QApplication::notify (this=0x896f8c8, receiver=0x8e96d60, e=0x9b8b8a0) at kernel/qapplication.cpp:3603
#17 0xb744b85d in KApplication::notify (this=0x896f8c8, receiver=0x8e96d60, event=0x9b8b8a0) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#18 0xb7e7dbcb in QCoreApplication::notifyInternal (this=0x896f8c8, receiver=0x8e96d60, event=0x9b8b8a0) at kernel/qcoreapplication.cpp:610
#19 0xb7e7e825 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8922b38) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#20 0xb7e7ea1d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#21 0xb7ea96af in postEventSourceDispatch (s=0x89af910) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#22 0xb64edb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#23 0xb64f10eb in ?? () from /usr/lib/libglib-2.0.so.0
#24 0xb64f1268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#25 0xb7ea92f8 in QEventDispatcherGlib::processEvents (this=0x89ad5d8, flags={i = -1075162856}) at kernel/qeventdispatcher_glib.cpp:327
#26 0xb69dca75 in QGuiEventDispatcherGlib::processEvents (this=0x89ad5d8, flags={i = -1075162808}) at kernel/qguieventdispatcher_glib.cpp:202
#27 0xb7e7c1fa in QEventLoop::processEvents (this=0xbfea51c0, flags={i = -1075162744}) at kernel/qeventloop.cpp:149
#28 0xb7e7c642 in QEventLoop::exec (this=0xbfea51c0, flags={i = -1075162680}) at kernel/qeventloop.cpp:201
#29 0xb7e7eae9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#30 0xb693abb7 in QApplication::exec () at kernel/qapplication.cpp:3525
#31 0xb3ba5310 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#32 0x0804e27d in launch (argc=1, _name=0x892357c "/usr/bin/plasma-desktop", args=0x8923594 "", cwd=0x0, envc=0, envs=0x8923598 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x805136d "0") at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:677
#33 0x0804ea5d in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1169
#34 0x0804efe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1362
#35 0x0804fbca in main (argc=2, argv=0xbfea59b4, envp=0xbfea59c0) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1793

This bug may be a duplicate of or related to bug 200770

Reported using DrKonqi