Version:           1.10.3 (using 4.1.3 (KDE 4.1.3), Kubuntu packages)
Compiler:          cc
OS:                Linux (x86_64) release 2.6.27

Every time I close kmail it crashes:

Applicazione: Kontact (kontact), segnale SIGABRT
(no debugging symbols found)
(no debugging symbols found)
...
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0x7f888148e6f0 (LWP 6402)]
(no debugging symbols found)
(no debugging symbols found)
...
(no debugging symbols found)
(no debugging symbols found)
[KCrash handler]
#5  0x00007f887eaebfd5 in raise () from /lib/libc.so.6
#6  0x00007f887eaedb43 in abort () from /lib/libc.so.6
#7  0x00007f887fcf06b5 in qt_message_output () from /usr/lib/libQtCore.so.4
#8  0x00007f887fcf07fd in qFatal () from /usr/lib/libQtCore.so.4
#9  0x00007f886f103538 in ?? () from /usr/lib/libkmailprivate.so.4
#10 0x00007f886f15d923 in ?? () from /usr/lib/libkmailprivate.so.4
#11 0x00007f886efbc9a9 in ?? () from /usr/lib/libkmailprivate.so.4
#12 0x00007f886f165ce2 in ?? () from /usr/lib/libkmailprivate.so.4
#13 0x00007f886f1d12aa in ?? () from /usr/lib/libkmailprivate.so.4
#14 0x00007f886f0cd8bc in ?? () from /usr/lib/libkmailprivate.so.4
#15 0x00007f886f11a67e in ?? () from /usr/lib/libkmailprivate.so.4
#16 0x00007f886f117dfa in ?? () from /usr/lib/libkmailprivate.so.4
#17 0x00007f886f11a67e in ?? () from /usr/lib/libkmailprivate.so.4
#18 0x00007f886f11866d in ?? () from /usr/lib/libkmailprivate.so.4
#19 0x00007f886f11c042 in ?? () from /usr/lib/libkmailprivate.so.4
#20 0x00007f886f1ebe4a in KMKernel::cleanup ()
   from /usr/lib/libkmailprivate.so.4
#21 0x00007f886f8891cc in ?? () from /usr/lib/kde4/kmailpart.so
#22 0x00007f888109ef1b in Kontact::MainWindow::~MainWindow ()
   from /usr/lib/libkontactprivate.so.4
#23 0x00007f887fdefdc5 in QObject::event () from /usr/lib/libQtCore.so.4
#24 0x00007f887f3549f6 in QWidget::event () from /usr/lib/libQtGui.so.4
#25 0x00007f887f66daab in QMainWindow::event () from /usr/lib/libQtGui.so.4
#26 0x00007f8880835458 in KXmlGuiWindow::event () from /usr/lib/libkdeui.so.5
#27 0x00007f887f302c3d in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#28 0x00007f887f30a9ea in QApplication::notify () from /usr/lib/libQtGui.so.4
#29 0x00007f888073cfcb in KApplication::notify () from /usr/lib/libkdeui.so.5
#30 0x00007f887fde0d61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#31 0x00007f887fde19fa in QCoreApplicationPrivate::sendPostedEvents ()
   from /usr/lib/libQtCore.so.4
#32 0x00007f887fe094d3 in ?? () from /usr/lib/libQtCore.so.4
#33 0x00007f887a57dd3b in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#34 0x00007f887a58150d in ?? () from /usr/lib/libglib-2.0.so.0
#35 0x00007f887a5816cb in g_main_context_iteration ()
   from /usr/lib/libglib-2.0.so.0
#36 0x00007f887fe0915f in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#37 0x00007f887f394a9f in ?? () from /usr/lib/libQtGui.so.4
#38 0x00007f887fddf682 in QEventLoop::processEvents ()
   from /usr/lib/libQtCore.so.4
#39 0x00007f887fddf80d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#40 0x00007f887fde1cbd in QCoreApplication::exec ()
   from /usr/lib/libQtCore.so.4
#41 0x00000000004048e5 in _start ()
#0  0x00007f887eb615f0 in __nanosleep_nocancel () from /lib/libc.so.6