Version:           4.2 beta 2 (using Devel)
OS:                Linux
Installed from:    Compiled sources

I was upgrading the following packages via apt, when suddenly I was notified that kmix had chrashed:

libsmbclient libssl0.9.8 libwbclient0 nvidia-177-kernel-source nvidia-177-modaliases nvidia-glx-177 openssl samba-common smbclient thunderbird winbind

backtrace:
Program: KMix (kmix), signal SIGABRT
0x00007f98699f45f0 in __nanosleep_nocancel () from /lib/libc.so.6

Thread 1 (Thread 0x7f986d3ca6f0 (LWP 6198)):
[KCrash Handler]
#5  0x00007f986997efd5 in raise () from /lib/libc.so.6
#6  0x00007f9869980b43 in abort () from /lib/libc.so.6
#7  0x00007f986b79a6b5 in qt_message_output () from /usr/lib/libQtCore.so.4
#8  0x00007f986b79a7fd in qFatal () from /usr/lib/libQtCore.so.4
#9  0x00007f986c87f20b in Solid::DeviceManagerPrivate::_k_deviceAdded (this=0xef6ba0, udi=@0x116c2f0) at /build/buildd/kde4libs-4.1.85/solid/solid/devicemanager.cpp:164
#10 0x00007f986c87f2e7 in Solid::DeviceManagerPrivate::qt_metacall (this=0xef6ba0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7fff753fbbe0)
    at /build/buildd/kde4libs-4.1.85/obj-x86_64-linux-gnu/solid/solid/devicemanager_p.moc:72
#11 0x00007f986b89f134 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#12 0x00007f986c88ea02 in Solid::Ifaces::DeviceManager::deviceAdded (this=0x1836, _t1=<value optimized out>)
    at /build/buildd/kde4libs-4.1.85/obj-x86_64-linux-gnu/solid/solid/ifaces/devicemanager.moc:79
#13 0x00007f986c8b234c in Solid::Backends::Hal::HalManager::qt_metacall (this=0xef6e70, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7fff753fbec0)
    at /build/buildd/kde4libs-4.1.85/obj-x86_64-linux-gnu/solid/solid/backends/hal/halmanager.moc:70
#14 0x00007f986bb98ea3 in ?? () from /usr/lib/libQtDBus.so.4
#15 0x00007f986bb9feef in ?? () from /usr/lib/libQtDBus.so.4
#16 0x00007f986b899da5 in QObject::event () from /usr/lib/libQtCore.so.4
#17 0x00007f986ab59c3d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#18 0x00007f986ab619ba in QApplication::notify () from /usr/lib/libQtGui.so.4
#19 0x00007f986c461f0b in KApplication::notify (this=0xdaa770, receiver=0xef6e70, event=0x116ced0) at /build/buildd/kde4libs-4.1.85/kdeui/kernel/kapplication.cpp:307
#20 0x00007f986b88ad61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#21 0x00007f986b88b9fa in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#22 0x00007f986b8b34d3 in ?? () from /usr/lib/libQtCore.so.4
#23 0x00007f98668cdd3b in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#24 0x00007f98668d150d in ?? () from /usr/lib/libglib-2.0.so.0
#25 0x00007f98668d16cb in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#26 0x00007f986b8b315f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#27 0x00007f986abeba6f in ?? () from /usr/lib/libQtGui.so.4
#28 0x00007f986b889682 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#29 0x00007f986b88980d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#30 0x00007f986b88bcbd in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#31 0x00007f986cf9f59a in kdemain () from /usr/lib/libkdeinit4_kmix.so
#32 0x00007f986996a466 in __libc_start_main () from /lib/libc.so.6
#33 0x0000000000400729 in _start ()