Here's a full trace found here: https://launchpad.net/bugs/262728

Thread 1 (process 10060):
#0  0xb70bbcb7 in QGraphicsLinearLayout::insertItem ()
   from /usr/lib/libQtGui.so.4
#1  0xb2a94263 in DeviceNotifier::initSysTray (this=0xa0e1c80)
    at /usr/include/qt4/QtGui/qgraphicslinearlayout.h:72
	list = {{p = {static shared_null = {ref = {_q_value = 6250}, 
        alloc = 0, begin = 0, end = 0, sharable = 1, array = {0x0}}, 
      d = 0xa2b46c8}, d = 0xa2b46c8}}
#2  0xb2a943d7 in DeviceNotifier::constraintsEvent (this=0xa0e1c80, 
    constraints={i = -1074519240})
    at /build/buildd/kdebase-workspace-4.1.0/plasma/applets/devicenotifier/devicenotifier.cpp:198
	isSizeConstrained = 128
#3  0xb7c5de45 in Plasma::Applet::flushPendingConstraintsEvents (
    this=0xa0e1c80)
    at /build/buildd/kdebase-workspace-4.1.0/libs/plasma/applet.cpp:850
No locals.
#4  0xb7c5e486 in Plasma::Applet::timerEvent (this=0xa0e1c80, event=0xbff4284c)
    at /build/buildd/kdebase-workspace-4.1.0/libs/plasma/applet.cpp:1484
No locals.
#5  0xb75832bf in QObject::event () from /usr/lib/libQtCore.so.4
#6  0xb70bebd7 in QGraphicsWidget::event () from /usr/lib/libQtGui.so.4
#7  0xb6b00bfc in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#8  0xb6b08a6e in QApplication::notify () from /usr/lib/libQtGui.so.4
#9  0xb7a41dcd in KApplication::notify (this=0x9ff4400, receiver=0xa0e1c80, 
    event=0xbff4284c)
    at /build/buildd/kde4libs-4.1.0/kdeui/kernel/kapplication.cpp:311
No locals.
#10 0xb7573bbf in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#11 0xb75a1b11 in ?? () from /usr/lib/libQtCore.so.4
#12 0xb759e2b0 in ?? () from /usr/lib/libQtCore.so.4
#13 0xb58897e1 in IA__g_main_context_dispatch (context=0x9ff3a98)
    at /build/buildd/glib2.0-2.17.7/glib/gmain.c:2073
No locals.
#14 0xb588ce83 in g_main_context_iterate (context=0x9ff3a98, block=1, 
    dispatch=1, self=0x9ff1b10)
    at /build/buildd/glib2.0-2.17.7/glib/gmain.c:2706
	max_priority = 0
	timeout = 0
	some_ready = 1
	nfds = 4
	allocated_nfds = <value optimized out>
	fds = (GPollFD *) 0xa1d9b90
	__PRETTY_FUNCTION__ = "g_main_context_iterate"
#15 0xb588d041 in IA__g_main_context_iteration (context=0x9ff3a98, may_block=1)
    at /build/buildd/glib2.0-2.17.7/glib/gmain.c:2769
	retval = <value optimized out>
#16 0xb759e208 in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#17 0xb6b9ab45 in ?? () from /usr/lib/libQtGui.so.4
#18 0xb757228a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#19 0xb757244a in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#20 0xb67b721b in KIO::NetAccess::enter_loop (this=0xbff42af0)
    at /build/buildd/kde4libs-4.1.0/kio/kio/netaccess.cpp:494
	eventLoop = <incomplete type>
#21 0xb67b741c in KIO::NetAccess::statInternal (this=0xbff42af0, 
    url=@0xbff42c5c, details=<value optimized out>, 
    side=KIO::NetAccess::SourceSide, window=0x0)
    at /build/buildd/kde4libs-4.1.0/kio/kio/netaccess.cpp:347
	job = (class KIO::StatJob *) 0xa27f770
#22 0xb67b81fb in KIO::NetAccess::stat (url=@0xbff42c5c, entry=@0xbff42b38, 
    window=0x0) at /build/buildd/kde4libs-4.1.0/kio/kio/netaccess.cpp:221
	kioNet = {<> = {<No data fields>}, static staticMetaObject = {d = {
      superdata = 0xb7653278, stringdata = 0xb68b6080 "KIO::NetAccess", 
      data = 0xb68b6160, extradata = 0x0}}, d = 0xa27ecc8}
	ret = <value optimized out>
#23 0xb67b827b in KIO::NetAccess::mostLocalUrl (url=@0xbff42c5c, window=0x0)
    at /build/buildd/kde4libs-4.1.0/kio/kio/netaccess.cpp:235
	entry = {d = {d = 0xa280018}}
	path = {static null = {<No data fields>}, static shared_null = {ref = {
      _q_value = 4785}, alloc = 0, size = 0, data = 0xb76599ba, clean = 0, 
    simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, 
    reserved = 0, array = {0}}, static shared_empty = {ref = {_q_value = 122}, 
    alloc = 0, size = 0, data = 0xb76599ce, clean = 0, simpletext = 0, 
    righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, 
  d = 0xa285348, static codecForCStrings = 0x0}
#24 0xb2aa4f1e in IconApplet::setUrl (this=0xa0f6ab8, url=@0xbff42c5c)
    at /build/buildd/kdebase-workspace-4.1.0/plasma/applets/icon/icon.cpp:109
No locals.
#25 0xb2aa56ff in IconApplet::init (this=0xa0f6ab8)
    at /build/buildd/kdebase-workspace-4.1.0/plasma/applets/icon/icon.cpp:78
	layout = <value optimized out>
	cg = {<KConfigBase> = {_vptr.KConfigBase = 0xb786b908}, d = {
    d = 0xa27fa60}}
#26 0xb7c8eaf7 in Plasma::Corona::loadLayout (this=0xa07ba38, 
    configName=@0xbff42e48)
    at /build/buildd/kdebase-workspace-4.1.0/libs/plasma/corona.cpp:288
	applet = (class Plasma::Applet *) 0x6f0068
	_container_ = {c = {{p = {static shared_null = {ref = {
            _q_value = 6250}, alloc = 0, begin = 0, end = 0, sharable = 1, 
          array = {0x0}}, d = 0xa117a58}, d = 0xa117a58}}, brk = 0, i = {
    i = 0xa117a78}, e = {i = 0xa117aa8}}
	cid = {static null = {<No data fields>}, static shared_null = {ref = {
      _q_value = 4785}, alloc = 0, size = 0, data = 0xb76599ba, clean = 0, 
    simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, 
    reserved = 0, array = {0}}, static shared_empty = {ref = {_q_value = 122}, 
    alloc = 0, size = 0, data = 0xb76599ce, clean = 0, simpletext = 0, 
    righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, 
  d = 0xa09ab60, static codecForCStrings = 0x0}
	containmentConfig = {<KConfigBase> = {_vptr.KConfigBase = 0xb786b908}, 
  d = {d = 0xa09ab20}}
	containment = (class Plasma::Containment *) 0xa0d4af0
	_container_ = {c = {{p = {static shared_null = {ref = {
            _q_value = 6250}, alloc = 0, begin = 0, end = 0, sharable = 1, 
          array = {0x0}}, d = 0xa1d8670}, d = 0xa1d8670}}, brk = 0, i = {
    i = 0xa1d8684}, e = {i = 0xa1d8694}}
	c = {d = 0xa07fab8}
	containments = {<KConfigBase> = {_vptr.KConfigBase = 0xb786b908}, d = {
    d = 0xa0b4470}}
#27 0xb7c8f8d1 in Plasma::Corona::initializeLayout (this=0xa07ba38, 
    configName=@0xbff42e48)
    at /build/buildd/kdebase-workspace-4.1.0/libs/plasma/corona.cpp:234
	coronaConfig = {<KConfigBase> = {_vptr.KConfigBase = 0xb7bf1104}, d = {
    d = 0xb7efaff4}}
#28 0xb7eee539 in PlasmaApp::corona (this=0x9ff4400)
    at /build/buildd/kdebase-workspace-4.1.0/plasma/plasma/plasmaapp.cpp:389
	c = <value optimized out>
#29 0xb7eefc20 in PlasmaApp (this=0x9ff4400, display=0x9fce390, 
    visual=167598264, colormap=31457281)
    at /build/buildd/kdebase-workspace-4.1.0/plasma/plasma/plasmaapp.cpp:213
No locals.
#30 0xb7ef1e21 in PlasmaApp::self ()
    at /build/buildd/kdebase-workspace-4.1.0/plasma/plasma/plasmaapp.cpp:109
No locals.
#31 0xb7ee37da in kdemain (argc=1, argv=0xbff430f4)
    at /build/buildd/kdebase-workspace-4.1.0/plasma/plasma/main.cpp:51
	aboutData = {d = 0x9fc55d0}
	options = {d = 0x9fce240}
	app = <value optimized out>
	rc = <value optimized out>
#32 0x080485b2 in main (argc=168696960, argv=0xb2a9dff4)
    at /build/buildd/kdebase-workspace-4.1.0/obj-i486-linux-gnu/plasma/plasma/plasma-qgv_dummy.cpp:3
No locals.

This is not related to krunner. some plasma bug. correcting component.

*** This bug has been marked as a duplicate of bug 170441 ***