Application that crashed: kopete
Version of the application: 0.80.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.31-gentoo-r2 x86_64

What I was doing when the application crashed:
I have Kone style installed.
Kopete crashed when I change chat style and focused chat window 

 -- Backtrace:
Application: Kopete (kopete), signal: Segmentation fault
[Current thread is 0 (LWP 19126)]

Thread 2 (Thread 0x7fab34ddd910 (LWP 19127)):
#0  0x00007fab44760279 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fab449cd46b in QWaitCondition::wait () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007fab45d24664 in ?? () from /usr/lib64/qt4/libQtNetwork.so.4
#3  0x00007fab449cc693 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007fab4475c2e7 in start_thread () from /lib/libpthread.so.0
#5  0x00007fab4302d9cd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fab48a0a750 (LWP 19126)):
[KCrash Handler]
#5  0x00007fab391c7fb8 in KHTMLPart::~KHTMLPart () from /usr/lib64/libkhtml.so.5
#6  0x00007fab38d96194 in ChatMessagePart::~ChatMessagePart () from /usr/lib64/libkopetechatwindow_shared.so.1
#7  0x00007fab464944b5 in KParts::Part::slotWidgetDestroyed () from /usr/lib64/libkparts.so.4
#8  0x00007fab464945ac in KParts::Part::qt_metacall () from /usr/lib64/libkparts.so.4
#9  0x00007fab46494605 in KParts::ReadOnlyPart::qt_metacall () from /usr/lib64/libkparts.so.4
#10 0x00007fab391d038e in KHTMLPart::qt_metacall () from /usr/lib64/libkhtml.so.5
#11 0x00007fab38d99930 in ChatMessagePart::qt_metacall () from /usr/lib64/libkopetechatwindow_shared.so.1
#12 0x00007fab44ab0fc4 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#13 0x00007fab44ab13b4 in QObject::destroyed () from /usr/lib64/qt4/libQtCore.so.4
#14 0x00007fab44ab33b1 in QObject::~QObject () from /usr/lib64/qt4/libQtCore.so.4
#15 0x00007fab43c3d494 in QWidget::~QWidget () from /usr/lib64/qt4/libQtGui.so.4
#16 0x00007fab44aac80c in QObjectPrivate::deleteChildren () from /usr/lib64/qt4/libQtCore.so.4
#17 0x00007fab43c3d7a9 in QWidget::~QWidget () from /usr/lib64/qt4/libQtGui.so.4
#18 0x00007fab43f3e731 in QFrame::~QFrame () from /usr/lib64/qt4/libQtGui.so.4
#19 0x00007fab44aac80c in QObjectPrivate::deleteChildren () from /usr/lib64/qt4/libQtCore.so.4
#20 0x00007fab43c3d7a9 in QWidget::~QWidget () from /usr/lib64/qt4/libQtGui.so.4
#21 0x00007fab43f3f211 in QGroupBox::~QGroupBox () from /usr/lib64/qt4/libQtGui.so.4
#22 0x00007fab44aac80c in QObjectPrivate::deleteChildren () from /usr/lib64/qt4/libQtCore.so.4
#23 0x00007fab43c3d309 in QWidget::~QWidget () from /usr/lib64/qt4/libQtGui.so.4
#24 0x00007fab44aac80c in QObjectPrivate::deleteChildren () from /usr/lib64/qt4/libQtCore.so.4
#25 0x00007fab43c3d7a9 in QWidget::~QWidget () from /usr/lib64/qt4/libQtGui.so.4
#26 0x00007fab43f98df1 in QStackedWidget::~QStackedWidget () from /usr/lib64/qt4/libQtGui.so.4
#27 0x00007fab44aac80c in QObjectPrivate::deleteChildren () from /usr/lib64/qt4/libQtCore.so.4
#28 0x00007fab43c3d7a9 in QWidget::~QWidget () from /usr/lib64/qt4/libQtGui.so.4
#29 0x00007fab43fa7f41 in QTabWidget::~QTabWidget () from /usr/lib64/qt4/libQtGui.so.4
#30 0x00007fab44aac80c in QObjectPrivate::deleteChildren () from /usr/lib64/qt4/libQtCore.so.4
#31 0x00007fab43c3d7a9 in QWidget::~QWidget () from /usr/lib64/qt4/libQtGui.so.4
#32 0x00007fab2f9b1cdd in ?? () from /usr/lib64/kde4/kcm_kopete_chatwindowconfig.so
#33 0x00007fab4124adc4 in KCModuleProxy::deleteClient () from /usr/lib64/libkutils.so.4
#34 0x00007fab41249b68 in ?? () from /usr/lib64/libkutils.so.4
#35 0x00007fab4124a005 in KCMultiDialog::qt_metacall () from /usr/lib64/libkutils.so.4
#36 0x00007fab412633e0 in KSettings::Dialog::qt_metacall () from /usr/lib64/libkutils.so.4
#37 0x00007fab44ab0fc4 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#38 0x00007fab43c46ac5 in QWidget::event () from /usr/lib64/qt4/libQtGui.so.4
#39 0x00007fab43bf92cc in QApplicationPrivate::notify_helper () from /usr/lib64/qt4/libQtGui.so.4
#40 0x00007fab43bfeb78 in QApplication::notify () from /usr/lib64/qt4/libQtGui.so.4
#41 0x00007fab45674306 in KApplication::notify () from /usr/lib64/libkdeui.so.5
#42 0x00007fab44a9f8fb in QCoreApplication::notifyInternal () from /usr/lib64/qt4/libQtCore.so.4
#43 0x00007fab43c4036a in QWidgetPrivate::hide_helper () from /usr/lib64/qt4/libQtGui.so.4
#44 0x00007fab43c47938 in QWidget::setVisible () from /usr/lib64/qt4/libQtGui.so.4
#45 0x00007fab43ffe010 in QDialog::setVisible () from /usr/lib64/qt4/libQtGui.so.4
#46 0x00007fab43ffd444 in QDialog::done () from /usr/lib64/qt4/libQtGui.so.4
#47 0x00007fab4124a0d4 in KCMultiDialog::qt_metacall () from /usr/lib64/libkutils.so.4
#48 0x00007fab412633e0 in KSettings::Dialog::qt_metacall () from /usr/lib64/libkutils.so.4
#49 0x00007fab44ab0fc4 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#50 0x00007fab455e8f48 in KDialog::slotButtonClicked () from /usr/lib64/libkdeui.so.5
#51 0x00007fab455eb159 in KDialog::qt_metacall () from /usr/lib64/libkdeui.so.5
#52 0x00007fab4569f070 in KPageDialog::qt_metacall () from /usr/lib64/libkdeui.so.5
#53 0x00007fab41249fd0 in KCMultiDialog::qt_metacall () from /usr/lib64/libkutils.so.4
#54 0x00007fab412633e0 in KSettings::Dialog::qt_metacall () from /usr/lib64/libkutils.so.4
#55 0x00007fab44ab0fc4 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#56 0x00007fab44ab57de in QSignalMapper::mapped () from /usr/lib64/qt4/libQtCore.so.4
#57 0x00007fab44ab5880 in QSignalMapper::map () from /usr/lib64/qt4/libQtCore.so.4
#58 0x00007fab44ab6b60 in QSignalMapper::qt_metacall () from /usr/lib64/qt4/libQtCore.so.4
#59 0x00007fab44ab0fc4 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#60 0x00007fab441646b7 in QAbstractButton::clicked () from /usr/lib64/qt4/libQtGui.so.4
#61 0x00007fab43efe76b in ?? () from /usr/lib64/qt4/libQtGui.so.4
#62 0x00007fab43eff62b in ?? () from /usr/lib64/qt4/libQtGui.so.4
#63 0x00007fab43eff855 in QAbstractButton::mouseReleaseEvent () from /usr/lib64/qt4/libQtGui.so.4
#64 0x00007fab43c46fe9 in QWidget::event () from /usr/lib64/qt4/libQtGui.so.4
#65 0x00007fab43bf92cc in QApplicationPrivate::notify_helper () from /usr/lib64/qt4/libQtGui.so.4
#66 0x00007fab43bff2c4 in QApplication::notify () from /usr/lib64/qt4/libQtGui.so.4
#67 0x00007fab45674306 in KApplication::notify () from /usr/lib64/libkdeui.so.5
#68 0x00007fab44a9f8fb in QCoreApplication::notifyInternal () from /usr/lib64/qt4/libQtCore.so.4
#69 0x00007fab43c00717 in QApplicationPrivate::sendMouseEvent () from /usr/lib64/qt4/libQtGui.so.4
#70 0x00007fab43c5b3a4 in ?? () from /usr/lib64/qt4/libQtGui.so.4
#71 0x00007fab43c5a1fa in QApplication::x11ProcessEvent () from /usr/lib64/qt4/libQtGui.so.4
#72 0x00007fab43c7ea24 in ?? () from /usr/lib64/qt4/libQtGui.so.4
#73 0x00007fab3fa15cf0 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#74 0x00007fab3fa19418 in ?? () from /usr/lib/libglib-2.0.so.0
#75 0x00007fab3fa195dc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#76 0x00007fab44ac3fe6 in QEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#77 0x00007fab43c7e2fe in ?? () from /usr/lib64/qt4/libQtGui.so.4
#78 0x00007fab44a9e322 in QEventLoop::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#79 0x00007fab44a9e4bd in QEventLoop::exec () from /usr/lib64/qt4/libQtCore.so.4
#80 0x00007fab44aa02a9 in QCoreApplication::exec () from /usr/lib64/qt4/libQtCore.so.4
#81 0x00000000004163d6 in _start ()

Reported using DrKonqi