Version:           1.11.0 (using 4.2.00 (KDE 4.2.0), Kubuntu packages)
Compiler:          cc
OS:                Linux (x86_64) release 2.6.27-11-generic

KMail
Version 1.11.0
Using KDE 4.2.00 (KDE 4.2.0)

All messages in the folder were read. I marked them all with Ctrl+a and hit the delete key to delete them. Kmail crashed.

Application: KMail (kmail), signal SIGABRT
0x00007f3c331c36e1 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 14337)]                     

Thread 3 (Thread 0x41b95950 (LWP 14347)):
#0  0x00007f3c331fa4b2 in select () from /lib/libc.so.6
#1  0x00007f3c33d6c006 in ?? () from /usr/lib/libQtCore.so.4
#2  0x00007f3c33ca3362 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00007f3c2ecc93ea in start_thread () from /lib/libpthread.so.0
#4  0x00007f3c33201cbd in clone () from /lib/libc.so.6             
#5  0x0000000000000000 in ?? ()                                    

Thread 2 (Thread 0x41394950 (LWP 14445)):
#0  0x00007f3c2eccd2d9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f3c33ca4349 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4       
#2  0x00007f3c350f729c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007f3c33ca3362 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f3c2ecc93ea in start_thread () from /lib/libpthread.so.0
#5  0x00007f3c33201cbd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f3c3869c6f0 (LWP 14337)):
[KCrash Handler]
#5  0x00007f3c3314e015 in raise () from /lib/libc.so.6
#6  0x00007f3c3314fb83 in abort () from /lib/libc.so.6
#7  0x00007f3c33c9b6b5 in qt_message_output () from /usr/lib/libQtCore.so.4
#8  0x00007f3c33c9b7fd in qFatal () from /usr/lib/libQtCore.so.4
#9  0x00007f3c375bb3ff in KMail::MessageListView::Core::Model::viewItemJobStepInternalForJobPass1Cleanup (this=0x10587c0, job=0x1e72600, tStart=@0x7fff406e65b0)
    at /build/buildd/kdepim-4.2.0/kmail/messagelistview/core/model.cpp:2931
#10 0x00007f3c375be1bd in KMail::MessageListView::Core::Model::viewItemJobStepInternalForJob (this=0x10587c0, job=0x3801, tStart=@0x7fff406e65b0)
    at /build/buildd/kdepim-4.2.0/kmail/messagelistview/core/model.cpp:3311
#11 0x00007f3c375be7f5 in KMail::MessageListView::Core::Model::viewItemJobStepInternal (this=0x10587c0) at /build/buildd/kdepim-4.2.0/kmail/messagelistview/core/model.cpp:3513
#12 0x00007f3c375bf738 in KMail::MessageListView::Core::Model::viewItemJobStep (this=0x10587c0) at /build/buildd/kdepim-4.2.0/kmail/messagelistview/core/model.cpp:3672
#13 0x00007f3c3716b118 in KMail::MessageListView::Core::Model::qt_metacall (this=0x10587c0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff406e68e0)
    at /build/buildd/kdepim-4.2.0/obj-x86_64-linux-gnu/kmail/moc_model.cpp:75
#14 0x00007f3c33da0134 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0x00007f3c33d9aa43 in QObject::event () from /usr/lib/libQtCore.so.4
#16 0x00007f3c344afc3d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#17 0x00007f3c344b79ba in QApplication::notify () from /usr/lib/libQtGui.so.4
#18 0x00007f3c380de5db in KApplication::notify (this=0x7fff406e73f0, receiver=0x1058ff0, event=0x7fff406e6f90) at /build/buildd/kde4libs-4.2.0/kdeui/kernel/kapplication.cpp:307
#19 0x00007f3c33d8bd61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#20 0x00007f3c33db7ab6 in ?? () from /usr/lib/libQtCore.so.4
#21 0x00007f3c33db41fd in ?? () from /usr/lib/libQtCore.so.4
#22 0x00007f3c2b4aed3b in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#23 0x00007f3c2b4b250d in ?? () from /usr/lib/libglib-2.0.so.0
#24 0x00007f3c2b4b26cb in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#25 0x00007f3c33db415f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#26 0x00007f3c34541a6f in ?? () from /usr/lib/libQtGui.so.4
#27 0x00007f3c33d8a682 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#28 0x00007f3c33d8a80d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#29 0x00007f3c33d8ccbd in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#30 0x000000000040309b in main (argc=<value optimized out>, argv=<value optimized out>) at /build/buildd/kdepim-4.2.0/kmail/main.cpp:146