Version:            (using KDE 4.4.1)
Installed from:    Gentoo Packages

Hello, I have freeze of kmail after random time, after have attach the process with gdb I have:
#0  0x00007fd96d2f6896 in *__GI___poll (fds=0x1ff5fe0, nfds=8, timeout=694) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fd966b0a239 in g_main_context_poll (context=0x1c13460, block=1, dispatch=1, self=<value optimized out>) at gmain.c:2904
#2  g_main_context_iterate (context=0x1c13460, block=1, dispatch=1, self=<value optimized out>) at gmain.c:2586
#3  0x00007fd966b0a52c in IA__g_main_context_iteration (context=0x1c13460, may_block=1) at gmain.c:2654
#4  0x00007fd96f6da71c in QEventDispatcherGlib::processEvents (this=0x1c07f10, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#5  0x00007fd96e7b9faf in QGuiEventDispatcherGlib::processEvents (this=0x1ff5fe0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#6  0x00007fd96f6a7572 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fd96f6a7a14 in QEventLoop::exec (this=0x7fffc1beb4e0, flags=...) at kernel/qeventloop.cpp:201
#8  0x00007fd97451dfef in KJob::exec (this=0x22a3d70) at /var/tmp/portage/kde-base/kdelibs-4.4.1-r1/work/kdelibs-4.4.1/kdecore/jobs/kjob.cpp:204
#9  0x00007fd973b72a21 in KMail::FancyHeaderStyle::format (this=<value optimized out>, message=0x24405f0, strategy=0x1c31180, vCardName=..., printing=<value optimized out>, topLevel=true)
    at /var/tmp/portage/kde-base/kmail-4.4.1/work/kmail-4.4.1/kmail/headerstyle.cpp:491
#10 0x00007fd9739f0792 in KMReaderWin::writeMsgHeader (this=0x1f366a0, aMsg=0x24405f0, vCardNode=0x0, topLevel=252) at /var/tmp/portage/kde-base/kmail-4.4.1/work/kmail-4.4.1/kmail/kmreaderwin.cpp:1726
#11 0x00007fd973a05b94 in KMReaderWin::parseMsg (this=0x1f366a0, aMsg=0x24405f0) at /var/tmp/portage/kde-base/kmail-4.4.1/work/kmail-4.4.1/kmail/kmreaderwin.cpp:1607
#12 0x00007fd9739f6f50 in KMReaderWin::displayMessage (this=0x1f366a0) at /var/tmp/portage/kde-base/kmail-4.4.1/work/kmail-4.4.1/kmail/kmreaderwin.cpp:1536
#13 0x00007fd9739f7155 in KMReaderWin::updateReaderWin (this=0x1f366a0) at /var/tmp/portage/kde-base/kmail-4.4.1/work/kmail-4.4.1/kmail/kmreaderwin.cpp:1479
#14 0x00007fd973a087ad in KMReaderWin::qt_metacall (this=0x1f366a0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffc1bf68b0)
    at /var/tmp/portage/kde-base/kmail-4.4.1/work/kmail-4.4.1_build/kmail/kmreaderwin.moc:179
#15 0x00007fd96f6c111f in QMetaObject::activate (sender=0x1f36748, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0xffffffffffffffff) at kernel/qobject.cpp:3285
#16 0x00007fd96f6bc5e3 in QObject::event (this=0x1f36748, e=0x8) at kernel/qobject.cpp:1204
#17 0x00007fd96e6ed5c1 in QApplicationPrivate::notify_helper (this=0x1c10c50, receiver=0x1f36748, e=0x7fffc1bf70e0) at kernel/qapplication.cpp:4300
#18 0x00007fd96e6f4742 in QApplication::notify (this=0x7fffc1bf7560, receiver=0x1f36748, e=0x7fffc1bf70e0) at kernel/qapplication.cpp:4265
#19 0x00007fd974b220c1 in KApplication::notify (this=0x7fffc1bf7560, receiver=0x1f36748, event=0x7fffc1bf70e0) at /var/tmp/portage/kde-base/kdelibs-4.4.1-r1/work/kdelibs-4.4.1/kdeui/kernel/kapplication.cpp:302
#20 0x00007fd96f6a908b in QCoreApplication::notifyInternal (this=0x7fffc1bf7560, receiver=0x1f36748, event=0x7fffc1bf70e0) at kernel/qcoreapplication.cpp:704
#21 0x00007fd96f6dea94 in QCoreApplication::sendEvent (this=0x1c14400) at kernel/qcoreapplication.h:215
#22 QTimerInfoList::activateTimers (this=0x1c14400) at kernel/qeventdispatcher_unix.cpp:603
#23 0x00007fd96f6dab18 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#24 idleTimerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#25 0x00007fd966b06609 in g_main_dispatch (context=0x1c13460) at gmain.c:1960
#26 IA__g_main_context_dispatch (context=0x1c13460) at gmain.c:2513
#27 0x00007fd966b0a368 in g_main_context_iterate (context=0x1c13460, block=1, dispatch=1, self=<value optimized out>) at gmain.c:2591
#28 0x00007fd966b0a52c in IA__g_main_context_iteration (context=0x1c13460, may_block=1) at gmain.c:2654
#29 0x00007fd96f6da71c in QEventDispatcherGlib::processEvents (this=0x1c07f10, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#30 0x00007fd96e7b9faf in QGuiEventDispatcherGlib::processEvents (this=0x1ff5fe0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#31 0x00007fd96f6a7572 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#32 0x00007fd96f6a7a14 in QEventLoop::exec (this=0x7fffc1bf7390, flags=...) at kernel/qeventloop.cpp:201
#33 0x00007fd96f6aa444 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#34 0x00000000004038f4 in main (argc=<value optimized out>, argv=<value optimized out>) at /var/tmp/portage/kde-base/kmail-4.4.1/work/kmail-4.4.1/kmail/main.cpp:156