Version:            (using KDE 4.0.83)
Installed from:    Unlisted Binary Package
OS:                Linux

Anytime I try to modify the association for .ogg audio files:
* dolphin, right click on "audio.ogg" then properties from the menu
* KEditFileType, click on "monkey wrench" button near "ogg Vorbis audio type"
* select any audio application
* ok -> appears "crash window"

Details for the crash are:
Application: KEditFileType (keditfiletype), signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0x7f8988b14780 (LWP 7411)]
[KCrash handler]
#5  0x00007f8987b9b238 in QString::operator== () from /usr/lib/libQtCore.so.4
#6  0x00000000004119cb in ?? ()
#7  0x0000000000411b61 in ?? ()
#8  0x00007f8987c53286 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#9  0x00007f89867adde7 in QAbstractButton::clicked ()
   from /usr/lib/libQtGui.so.4
#10 0x00007f89865422fb in ?? () from /usr/lib/libQtGui.so.4
#11 0x00007f8986543ac5 in ?? () from /usr/lib/libQtGui.so.4
#12 0x00007f8986543cf1 in QAbstractButton::mouseReleaseEvent ()
   from /usr/lib/libQtGui.so.4
#13 0x00007f89862894e0 in QWidget::event () from /usr/lib/libQtGui.so.4
#14 0x00007f8986542e20 in QAbstractButton::event ()
   from /usr/lib/libQtGui.so.4
#15 0x00007f89865d7b78 in QPushButton::event () from /usr/lib/libQtGui.so.4
#16 0x00007f898623b54f in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#17 0x00007f8986240329 in QApplication::notify () from /usr/lib/libQtGui.so.4
#18 0x00007f89885573b1 in KApplication::notify ()
   from /usr/lib/kde4/lib/libkdeui.so.5
#19 0x00007f8987c3f109 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#20 0x00007f898623d455 in QApplicationPrivate::sendMouseEvent ()
   from /usr/lib/libQtGui.so.4
#21 0x00007f898629f756 in ?? () from /usr/lib/libQtGui.so.4
#22 0x00007f898629e66b in QApplication::x11ProcessEvent ()
   from /usr/lib/libQtGui.so.4
#23 0x00007f89862c48f3 in ?? () from /usr/lib/libQtGui.so.4
#24 0x00007f89838e2262 in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#25 0x00007f89838e5516 in ?? () from /usr/lib/libglib-2.0.so.0
#26 0x00007f89838e59af in g_main_context_iteration ()
   from /usr/lib/libglib-2.0.so.0
#27 0x00007f8987c683af in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#28 0x00007f89862c472f in ?? () from /usr/lib/libQtGui.so.4
#29 0x00007f8987c3e585 in QEventLoop::processEvents ()
   from /usr/lib/libQtCore.so.4
#30 0x00007f8987c3e6db in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#31 0x00007f8987c40729 in QCoreApplication::exec ()
   from /usr/lib/libQtCore.so.4
#32 0x000000000040c595 in _start ()
#0  0x00007f8985aa3b50 in nanosleep () from /lib/libc.so.6


I installed Kde4.1 beta2 from http://ppa.launchpad.net/kubuntu-members-kde4/ubuntu repo (64bit component).
Note: the "program association list" for .ogg files is now empty.
Bye.