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 2.6.30-ARCH i686

What I was doing when the application crashed:
after connecting via wi-fi to my lan, i double click on the icon i've created to mount a nfs share (the icon is shown in the 'vista delle cartelle' window). at this point there is the crash.

 -- Backtrace:
Application: Spazio di lavoro di Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 2180)]

Thread 2 (Thread 0xa815cb70 (LWP 2187)):
#0  0xb7f0b424 in __kernel_vsyscall ()
#1  0xb7ca6b95 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7d05047 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb6573c12 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7d04032 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7ca265c in start_thread () from /lib/libpthread.so.0
#6  0xb67f01fe in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5df4700 (LWP 2180)):
[KCrash Handler]
#6  0xb70c496a in QGraphicsLayoutItem::isLayout () from /usr/lib/libQtGui.so.4
#7  0xb70c387d in ?? () from /usr/lib/libQtGui.so.4
#8  0xb70c387d in ?? () from /usr/lib/libQtGui.so.4
#9  0xb70c3086 in QGraphicsLayout::activate () from /usr/lib/libQtGui.so.4
#10 0xb70c315c in QGraphicsLayout::widgetEvent () from /usr/lib/libQtGui.so.4
#11 0xb70c9146 in QGraphicsWidget::event () from /usr/lib/libQtGui.so.4
#12 0xb6a7b994 in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#13 0xb6a8307c in QApplication::notify () from /usr/lib/libQtGui.so.4
#14 0xb74be43a in KApplication::notify () from /usr/lib/libkdeui.so.5
#15 0xb7df2fcb in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#16 0xb7df3bb2 in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#17 0xb7df3d7d in QCoreApplication::sendPostedEvents () from /usr/lib/libQtCore.so.4
#18 0xb7e1da9f in ?? () from /usr/lib/libQtCore.so.4
#19 0xb6685d98 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#20 0xb66893e0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#21 0xb6689513 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#22 0xb7e1d6cc in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#23 0xb6b196c5 in ?? () from /usr/lib/libQtGui.so.4
#24 0xb7df1579 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#25 0xb7df19ca in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#26 0xb7df3e3f in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#27 0xb6a7b817 in QApplication::exec () from /usr/lib/libQtGui.so.4
#28 0xb38d061d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#29 0x0804de22 in _start ()

Reported using DrKonqi