Version:           3.5 (using 4.1.96 (KDE 4.1.96 (KDE 4.2 RC1)), Debian packages)
Compiler:          cc
OS:                Linux (i686) release 2.6.26-1-686-bigmem

kmix (applet) crashes when removing a usb webcam  and plugging a usb headset

here is the backtrace  

Application: KMix (kmix), signal SIGABRT

Thread 1 (Thread 0xb64036c0 (LWP 24276)):
[KCrash Handler]
#6  0xb7f5a424 in __kernel_vsyscall ()
#7  0xb7daf640 in raise () from /lib/i686/cmov/libc.so.6
#8  0xb7db1018 in abort () from /lib/i686/cmov/libc.so.6
#9  0xb73b26cd in qt_message_output (msgType=QtFatalMsg, buf=0xbfe72d30 "ASSERT: \"dev->backendObject()==0\" in file ../../../solid/solid/devicemanager.cpp, line 164") at global/qglobal.cpp:2102
#10 0xb73b2796 in qFatal (msg=0xb74fa458 "ASSERT: \"%s\" in file %s, line %d") at global/qglobal.cpp:2303
#11 0xb73b2825 in qt_assert (assertion=0xb7d2e23f "dev->backendObject()==0", file=0xb7d2e278 "../../../solid/solid/devicemanager.cpp", line=164) at global/qglobal.cpp:1872
#12 0xb7ce752a in Solid::DeviceManagerPrivate::_k_deviceAdded (this=0x81ca448, udi=@0x829f368) at ../../../solid/solid/devicemanager.cpp:164
#13 0xb7ce75ff in Solid::DeviceManagerPrivate::qt_metacall (this=0x81ca448, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfe74ecc) at ./devicemanager_p.moc:72
#14 0xb74bebe0 in QMetaObject::activate (sender=0x81ca290, from_signal_index=4, to_signal_index=4, argv=0xbfe74ecc) at kernel/qobject.cpp:3031
#15 0xb74bf962 in QMetaObject::activate (sender=0x81ca290, m=0xb7d39618, local_signal_index=0, argv=0xbfe74ecc) at kernel/qobject.cpp:3101
#16 0xb7cf9653 in Solid::Ifaces::DeviceManager::deviceAdded (this=0x81ca290, _t1=@0x829f368) at ./ifaces/devicemanager.moc:79
#17 0xb7d2013e in Solid::Backends::Hal::HalManager::slotDeviceAdded (this=0x81ca290, udi=@0x829f368) at ../../../solid/solid/backends/hal/halmanager.cpp:213
#18 0xb7d201da in Solid::Backends::Hal::HalManager::qt_metacall (this=0x81ca290, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfe74fd8) at ./backends/hal/halmanager.moc:70
#19 0xb75b119b in QDBusConnectionPrivate::deliverCall (this=0x81ca388, object=0x81ca290, msg=@0x829b7fc, metaTypes=@0x829b800, slotIdx=6) at qdbusintegrator.cpp:849
#20 0xb75b84b7 in QDBusCallDeliveryEvent::placeMetaCall (this=0x829b7d0, object=0x81ca290) at qdbusintegrator_p.h:130
#21 0xb74b98f1 in QObject::event (this=0x81ca290, e=0x829b7d0) at kernel/qobject.cpp:1155
#22 0xb6b9f79c in QApplicationPrivate::notify_helper (this=0x80b44a0, receiver=0x81ca290, e=0x829b7d0) at kernel/qapplication.cpp:3803
#23 0xb6ba761e in QApplication::notify (this=0x80a3f28, receiver=0x81ca290, e=0x829b7d0) at kernel/qapplication.cpp:3393
#24 0xb7b167fd in KApplication::notify (this=0x80a3f28, receiver=0x81ca290, event=0x829b7d0) at ../../kdeui/kernel/kapplication.cpp:307
#25 0xb74aa0e1 in QCoreApplication::notifyInternal (this=0x80a3f28, receiver=0x81ca290, event=0x829b7d0) at kernel/qcoreapplication.cpp:587
#26 0xb74aad65 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8099688) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:209
#27 0xb74aaf5d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1091
#28 0xb6c39e6f in QEventDispatcherX11::processEvents (this=0x80ab850, flags={i = -1075357864}) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:214
#29 0xb74a87aa in QEventLoop::processEvents (this=0xbfe757d0, flags={i = -1075357800}) at kernel/qeventloop.cpp:143
#30 0xb74a896a in QEventLoop::exec (this=0xbfe757d0, flags={i = -1075357736}) at kernel/qeventloop.cpp:194
#31 0xb74ab025 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:845
#32 0xb6b9f617 in QApplication::exec () at kernel/qapplication.cpp:3331
#33 0xb7ef1b7b in kdemain () from /usr/lib/libkdeinit4_kmix.so
#34 0x08048582 in _start ()