Application that crashed: kmail
Version of the application: 1.12.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-20-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I was using KMail, closing the Thunderbird-Imported folder, was going to CHECK MAIL when crash reporting assistant came up.  Tried to import 1,000+ .eml files.  Most, not all, files were imported.

 -- Backtrace:
Application: KMail (kmail), signal: Aborted
[Current thread is 1 (Thread 0xb76dcaa0 (LWP 2203))]

Thread 2 (Thread 0xafd3cb70 (LWP 2288)):
[KCrash Handler]
#6  0x00fbb422 in __kernel_vsyscall ()
#7  0x057c24d1 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0x057c5932 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0x04185046 in g_logv () from /lib/libglib-2.0.so.0
#10 0x04185076 in g_log () from /lib/libglib-2.0.so.0
#11 0x0417b98d in ?? () from /lib/libglib-2.0.so.0
#12 0x0417ba24 in g_main_context_new () from /lib/libglib-2.0.so.0
#13 0x06fccf0a in QEventDispatcherGlibPrivate::QEventDispatcherGlibPrivate(_GMainContext*) () from /usr/lib/libQtCore.so.4
#14 0x06fcd13b in QEventDispatcherGlib::QEventDispatcherGlib(QObject*) () from /usr/lib/libQtCore.so.4
#15 0x06eb0c74 in ?? () from /usr/lib/libQtCore.so.4
#16 0x06eb0e09 in ?? () from /usr/lib/libQtCore.so.4
#17 0x078e380e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#18 0x058648de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb76dcaa0 (LWP 2203)):
#0  0x00fbb422 in __kernel_vsyscall ()
#1  0x078e7e15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x0587187d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x06eb1e67 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#4  0x06ea558a in ?? () from /usr/lib/libQtCore.so.4
#5  0x06ea5ac0 in QThreadPool::~QThreadPool() () from /usr/lib/libQtCore.so.4
#6  0x06ea6d0a in ?? () from /usr/lib/libQtCore.so.4
#7  0x057c705f in ?? () from /lib/tls/i686/cmov/libc.so.6
#8  0x057c70cf in exit () from /lib/tls/i686/cmov/libc.so.6
#9  0x03882d8b in ?? () from /usr/lib/libQtGui.so.4
#10 0x0035654a in KApplication::xioErrhandler(_XDisplay*) () from /usr/lib/libkdeui.so.5
#11 0x00356586 in ?? () from /usr/lib/libkdeui.so.5
#12 0x012002e6 in _XIOError () from /usr/lib/libX11.so.6
#13 0x01207f8a in ?? () from /usr/lib/libX11.so.6
#14 0x012088c6 in _XEventsQueued () from /usr/lib/libX11.so.6
#15 0x011f15ff in XEventsQueued () from /usr/lib/libX11.so.6
#16 0x038c0db5 in ?? () from /usr/lib/libQtGui.so.4
#17 0x0417dcd1 in g_main_context_check () from /lib/libglib-2.0.so.0
#18 0x0417e47c in ?? () from /lib/libglib-2.0.so.0
#19 0x0417e863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#20 0x06fcc02c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#21 0x038c0be5 in ?? () from /usr/lib/libQtGui.so.4
#22 0x06f9fc79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#23 0x06fa00ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#24 0x06fa253f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#25 0x0381fdd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#26 0x0804a702 in _start ()

Reported using DrKonqi