Version:           4.1.85 (using Devel)
OS:                Linux
Installed from:    Compiled sources

I don't know why, but sometimes my krunner crushes.

I only press Alt+F2 and the KBug windows open up.
Here the backtrace I have:

Applicazione: Interfaccia al comando di esecuzione (krunner), segnale SIGABRT
[Current thread is 0 (LWP 19506)]

Thread 2 (Thread 0xa968ab90 (LWP 19753)):
#0  0xb7fa4430 in __kernel_vsyscall ()
#1  0xb680ec01 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb6c28150 in ?? () from /usr/lib/libQtCore.so.4
#3  0xb6b586ae in ?? () from /usr/lib/libQtCore.so.4
#4  0xb572e50f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb68167ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5307a00 (LWP 19506)):
[KCrash Handler]
#6  0xb7fa4430 in __kernel_vsyscall ()
#7  0xb6760880 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0xb6762248 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0xb6b50795 in qt_message_output () from /usr/lib/libQtCore.so.4
#10 0xb6b50872 in qFatal () from /usr/lib/libQtCore.so.4
#11 0xb6b50915 in qt_assert () from /usr/lib/libQtCore.so.4
#12 0xb6e0f530 in KConfigGroup::KConfigGroup () from /usr/lib/libkdecore.so.5
#13 0xb7e09ccc in Plasma::Theme::findInRectsCache () from /usr/lib/libplasma.so.3
#14 0xb7e04a49 in Plasma::Svg::elementSize () from /usr/lib/libplasma.so.3
#15 0xb7dd276f in ?? () from /usr/lib/libplasma.so.3
#16 0xb7dd30a5 in Plasma::FrameSvg::resizeFrame () from /usr/lib/libplasma.so.3
#17 0xb7f421f1 in ?? () from /usr/lib/libkdeinit4_krunner.so
#18 0xb7f4cf02 in ?? () from /usr/lib/libkdeinit4_krunner.so
#19 0xb716677d in QWidget::event () from /usr/lib/libQtGui.so.4
#20 0xb7f42273 in ?? () from /usr/lib/libkdeinit4_krunner.so
#21 0xb710e8ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#22 0xb71167fa in QApplication::notify () from /usr/lib/libQtGui.so.4
#23 0xb7ae8d3d in KApplication::notify () from /usr/lib/libkdeui.so.5
#24 0xb6c48e61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#25 0xb71610ac in QWidgetPrivate::sendPendingMoveAndResizeEvents () from /usr/lib/libQtGui.so.4
#26 0xb71697b6 in QWidgetPrivate::show_helper () from /usr/lib/libQtGui.so.4
#27 0xb7169e73 in QWidget::setVisible () from /usr/lib/libQtGui.so.4
#28 0xb757c84d in QDialog::setVisible () from /usr/lib/libQtGui.so.4
#29 0xb7f4d3c6 in ?? () from /usr/lib/libkdeinit4_krunner.so
#30 0xb7f44d96 in ?? () from /usr/lib/libkdeinit4_krunner.so
#31 0xb7f45b78 in ?? () from /usr/lib/libkdeinit4_krunner.so
#32 0xb6c5da60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#33 0xb6c5de60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#34 0xb71085f1 in QAction::triggered () from /usr/lib/libQtGui.so.4
#35 0xb7108f5f in QAction::activate () from /usr/lib/libQtGui.so.4
#36 0xb7b36208 in ?? () from /usr/lib/libkdeui.so.5
#37 0xb7b3a7cf in KGlobalAccel::qt_metacall () from /usr/lib/libkdeui.so.5
#38 0xb6c5da60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#39 0xb6c5e7e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#40 0xb7b3d5f5 in ?? () from /usr/lib/libkdeui.so.5
#41 0xb7b3e6f0 in ?? () from /usr/lib/libkdeui.so.5
#42 0xb6d5126e in ?? () from /usr/lib/libQtDBus.so.4
#43 0xb6d58627 in ?? () from /usr/lib/libQtDBus.so.4
#44 0xb6c58771 in QObject::event () from /usr/lib/libQtCore.so.4
#45 0xb710e8ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#46 0xb711672e in QApplication::notify () from /usr/lib/libQtGui.so.4
#47 0xb7ae8d3d in KApplication::notify () from /usr/lib/libkdeui.so.5
#48 0xb6c48e61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#49 0xb6c49ae5 in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#50 0xb6c49cdd in QCoreApplication::sendPostedEvents () from /usr/lib/libQtCore.so.4
#51 0xb6c7382f in ?? () from /usr/lib/libQtCore.so.4
#52 0xb577a6f8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#53 0xb577dda3 in ?? () from /usr/lib/libglib-2.0.so.0
#54 0xb577df61 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#55 0xb6c73478 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#56 0xb71a8ea5 in ?? () from /usr/lib/libQtGui.so.4
#57 0xb6c4752a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#58 0xb6c476ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#59 0xb6c49da5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#60 0xb710e767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#61 0xb7f46f6c in kdemain () from /usr/lib/libkdeinit4_krunner.so
#62 0x08048712 in _start ()

I hope you'll be able to understand what's going on,
Thankyou for your time