Closing KMail seg faults in plasma_applet_menubar.so

I can send a back trace if you can point me to the correct debug symbols package. It is 100% reproducible, happens every time I close KMail with no other applications open.

Application: plasma-desktop (0.4)
KDE Platform Version: 4.8.2 (4.8.2)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-24-generic x86_64
Distribution: Ubuntu 12.04 LTS

Steps to reproduce:
1. Open KMail with no other applications that use the menubar open
2. Close KMail

Results
1-3 seconds after KMail closes a segmentation fault 11 is caught.

Relevant stack trace:

#6 QVariant::userType (this=0x0) at kernel/qvariant.cpp:1784
#7 0x00007fc8f33e52d2 in ?? () from /usr/lib/kde4/plasma_applet_menubar.so
#8 0x00007fc8f33dbd39 in ?? () from /usr/lib/kde4/plasma_applet_menubar.so
#9 0x00007fc8f33dbdbb in ?? () from /usr/lib/kde4/plasma_applet_menubar.so
#10 0x00007fc93656737b in QDBusConnectionPrivate::deliverCall (this=0x1c2bd90, object=0x53e98c0, msg=..., metaTypes=..., slotIdx=11) at qdbusintegrator.cpp:947
#11 0x00007fc936206446 in QObject::event (this=0x53e98c0, e=<optimized out>) at kernel/qobject.cpp:1195
#12 0x00007fc93556f894 in notify_helper (e=0x53920f0, receiver=0x53e98c0, this=0x1c7eaa0) at kernel/qapplication.cpp:4559
#13 QApplicationPrivate::notify_helper (this=0x1c7eaa0, receiver=0x53e98c0, e=0x53920f0) at kernel/qapplication.cpp:4531
#14 0x00007fc935574713 in QApplication::notify (this=0x1c3fab0, receiver=0x53e98c0, e=0x53920f0) at kernel/qapplication.cpp:4420
#15 0x00007fc936ec9b46 in KApplication::notify (this=0x1c3fab0, receiver=0x53e98c0, event=0x53920f0) at ../../kdeui/kernel/kapplication.cpp:311
#16 0x00007fc9361ece9c in QCoreApplication::notifyInternal (this=0x1c3fab0, receiver=0x53e98c0, event=0x53920f0) at kernel/qcoreapplication.cpp:876
#17 0x00007fc9361f0c6a in sendEvent (event=0x53920f0, receiver=0x53e98c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#18 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x1b851f0) at kernel/qcoreapplication.cpp:1500
#19 0x00007fc93621bf93 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#20 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:279
#21 0x00007fc92d1fbc9a in g_main_dispatch (context=0x1c81740) at /build/buildd/glib2.0-2.32.1/./glib/gmain.c:2515
#22 g_main_context_dispatch (context=0x1c81740) at /build/buildd/glib2.0-2.32.1/./glib/gmain.c:3052
#23 0x00007fc92d1fc060 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x1c81740, self=<optimized out>) at /build/buildd/glib2.0-2.32.1/./glib/gmain.c:3123
#24 g_main_context_iterate (context=0x1c81740, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.32.1/./glib/gmain.c:3060
#25 0x00007fc92d1fc124 in g_main_context_iteration (context=0x1c81740, may_block=1) at /build/buildd/glib2.0-2.32.1/./glib/gmain.c:3184
#26 0x00007fc93621c3bf in QEventDispatcherGlib::processEvents (this=0x1b86ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#27 0x00007fc935617d5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007fc9361ebc82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007fc9361ebed7 in QEventLoop::exec (this=0x7fff39bf2910, flags=...) at kernel/qeventloop.cpp:204
#30 0x00007fc9361f0f67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#31 0x00007fc939356a13 in kdemain (argc=1, argv=0x7fff39bf2cf8) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x00007fc938f7976d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff39bf2cf8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff39bf2ce8) at libc-start.c:226
#33 0x0000000000400671 in _start ()