Version:            (using KDE 4.1.2)
OS:                Linux
Installed from:    Ubuntu Packages

here is the report from KMIx crash handler.. dunno what it mean..

Application: KMix (kmix), signal SIGABRT
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0x7feac1a1e6f0 (LWP 5528)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[KCrash handler]
#5  0x00007feac128bfd5 in raise () from /lib/libc.so.6
#6  0x00007feac128db43 in abort () from /lib/libc.so.6
#7  0x00007feabff5c6b5 in qt_message_output () from /usr/lib/libQtCore.so.4
#8  0x00007feabff5c7fd in qFatal () from /usr/lib/libQtCore.so.4
#9  0x00007feac07b5363 in ?? () from /usr/lib/libsolid.so.4
#10 0x00007feac07b5677 in ?? () from /usr/lib/libsolid.so.4
#11 0x00007feac0061134 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#12 0x00007feac07c4d02 in ?? () from /usr/lib/libsolid.so.4
#13 0x00007feac07e78ac in ?? () from /usr/lib/libsolid.so.4
#14 0x00007feabfcacea3 in ?? () from /usr/lib/libQtDBus.so.4
#15 0x00007feabfcb3eef in ?? () from /usr/lib/libQtDBus.so.4
#16 0x00007feac005bda5 in QObject::event () from /usr/lib/libQtCore.so.4
#17 0x00007feabf0b7c3d in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#18 0x00007feabf0bf9ea in QApplication::notify () from /usr/lib/libQtGui.so.4
#19 0x00007feac0e80b8b in KApplication::notify () from /usr/lib/libkdeui.so.5
#20 0x00007feac004cd61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#21 0x00007feac004d9fa in QCoreApplicationPrivate::sendPostedEvents ()
   from /usr/lib/libQtCore.so.4
#22 0x00007feac00754d3 in ?? () from /usr/lib/libQtCore.so.4
#23 0x00007feabc713d3b in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#24 0x00007feabc71750d in ?? () from /usr/lib/libglib-2.0.so.0
#25 0x00007feabc7176cb in g_main_context_iteration ()
   from /usr/lib/libglib-2.0.so.0
#26 0x00007feac007515f in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#27 0x00007feabf149a9f in ?? () from /usr/lib/libQtGui.so.4
#28 0x00007feac004b682 in QEventLoop::processEvents ()
   from /usr/lib/libQtCore.so.4
#29 0x00007feac004b80d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#30 0x00007feac004dcbd in QCoreApplication::exec ()
   from /usr/lib/libQtCore.so.4
#31 0x00007feac15e752a in kdemain () from /usr/lib/libkdeinit4_kmix.so
#32 0x00007feac1277466 in __libc_start_main () from /lib/libc.so.6
#33 0x0000000000400659 in _start ()
#0  0x00007feac13015f0 in nanosleep () from /lib/libc.so.6



this happened after I updated the Nvidia driver using the (recommended) version of the driver.. nvidia somethig 177 i think. I hope this could help in someway..