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

I just observed the following crash, but I'm unable to reproduce it. The crash occured when I chose a different address book category from the Address Book dropdown box in the Select Recepient dialog.

Application: KMail (kmail), signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0xb42996c0 (LWP 6336)]
[New Thread 0xb2cc7b90 (LWP 6337)]
[KCrash handler]
#6  RecipientsCollection::getEquivalentItem (this=0xb3fc550, item=0xb529468)
    at /usr/include/qt4/QtCore/qatomic_i386.h:116
#7  0xb7de2910 in RecipientsPicker::updateList (this=0x9a69aa0)
    at /build/buildd/kdepim-4.1.3/kmail/recipientspicker.cpp:679
#8  0xb7de626b in RecipientsPicker::qt_metacall (this=0x9a69aa0, 
    _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0xbfebe82c)
    at /build/buildd/kdepim-4.1.3/obj-i486-linux-gnu/kmail/recipientspicker.moc:194
#9  0xb71b0a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#10 0xb71b17e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0xb6be6e63 in QComboBox::activated () from /usr/lib/libQtGui.so.4
#12 0xb6be916e in ?? () from /usr/lib/libQtGui.so.4
#13 0xb6beb3c5 in ?? () from /usr/lib/libQtGui.so.4
#14 0xb6bf09ce in QComboBox::qt_metacall () from /usr/lib/libQtGui.so.4
#15 0xb71b0a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#16 0xb71b17e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#17 0xb6e7bf23 in ?? () from /usr/lib/libQtGui.so.4
#18 0xb6be8bf9 in ?? () from /usr/lib/libQtGui.so.4
#19 0xb719b04a in QCoreApplicationPrivate::sendThroughObjectEventFilters ()
   from /usr/lib/libQtCore.so.4
#20 0xb688c8ca in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#21 0xb6895121 in QApplication::notify () from /usr/lib/libQtGui.so.4
#22 0xb766ab2d in KApplication::notify (this=0xbfebf838, receiver=0xb926548, 
    event=0xbfebeef8)
    at /build/buildd/kde4libs-4.1.3/kdeui/kernel/kapplication.cpp:311
#23 0xb719be61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#24 0xb68943ae in QApplicationPrivate::sendMouseEvent ()
   from /usr/lib/libQtGui.so.4
#25 0xb68fe91e in ?? () from /usr/lib/libQtGui.so.4
#26 0xb68fda25 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#27 0xb69277ea in ?? () from /usr/lib/libQtGui.so.4
#28 0xb4c1b6f8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#29 0xb4c1eda3 in ?? () from /usr/lib/libglib-2.0.so.0
#30 0xb4c1ef61 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#31 0xb71c6478 in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#32 0xb6926ee5 in ?? () from /usr/lib/libQtGui.so.4
#33 0xb719a52a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#34 0xb719a6ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#35 0xb719cda5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#36 0xb688c767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#37 0x0804a6c0 in main (argc=-1207442104, argv=0x94c6bc0)
    at /build/buildd/kdepim-4.1.3/kmail/main.cpp:146
#0  0xb80bd430 in __kernel_vsyscall ()