Version:           0.70.2 (using 4.2.3 (KDE 4.2.3), Gentoo)
Compiler:          x86_64-pc-linux-gnu-gcc
OS:                Linux (x86_64) release 2.6.29-zen1

1) Open chat window
2) Send message
3) Go to Settings -> Configure -> Chat Window -> Choose anothe style (Gaim, for example) -> Press OK (or Apply).

That's backtrase:

Приложение: Kopete (kopete), сигнал SIGSEGV
0x00007f6be82b27e1 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 10247)]                     

Thread 3 (Thread 0x4092c950 (LWP 10248)):
#0  0x00007f6be82e7206 in poll () from /lib/libc.so.6
#1  0x00007f6be4cd6ee8 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f6be4cd720b in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f6be9dbe2ce in QEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f6be9d977c2 in QEventLoop::processEvents () from /usr/lib64/qt4/libQtCore.so.4          
#5  0x00007f6be9d97955 in QEventLoop::exec () from /usr/lib64/qt4/libQtCore.so.4                   
#6  0x00007f6bdc9b729b in QCA::SyncThread::run () from /usr/lib64/qca2/libqca.so.2                 
#7  0x00007f6be9cc4ca9 in ?? () from /usr/lib64/qt4/libQtCore.so.4                                 
#8  0x00007f6be9a5442a in start_thread () from /lib/libpthread.so.0                                
#9  0x00007f6be82f0b5d in clone () from /lib/libc.so.6                                             
#10 0x0000000000000000 in ?? ()                                                                    

Thread 2 (Thread 0x41ca0950 (LWP 10249)):
#0  0x00007f6be9a58329 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f6be9cc5a29 in QWaitCondition::wait () from /usr/lib64/qt4/libQtCore.so.4 
#2  0x00007f6beaff6394 in ?? () from /usr/lib64/qt4/libQtNetwork.so.4                
#3  0x00007f6be9cc4ca9 in ?? () from /usr/lib64/qt4/libQtCore.so.4                   
#4  0x00007f6be9a5442a in start_thread () from /lib/libpthread.so.0                  
#5  0x00007f6be82f0b5d in clone () from /lib/libc.so.6                               
#6  0x0000000000000000 in ?? ()                                                      

Thread 1 (Thread 0x7f6beda57750 (LWP 10247)):
[KCrash Handler]                             
#5  0x00007f6bde1b3a93 in ChatWindowStyle::getFooterHtml () from /usr/lib64/libkopetechatwindow_shared.so.1
#6  0x00007f6bde1a2f09 in ChatMessagePart::writeTemplate () from /usr/lib64/libkopetechatwindow_shared.so.1
#7  0x00007f6bde1a77fb in ChatMessagePart::changeStyle () from /usr/lib64/libkopetechatwindow_shared.so.1
#8  0x00007f6bde1a7ae5 in ChatMessagePart::qt_metacall () from /usr/lib64/libkopetechatwindow_shared.so.1
#9  0x00007f6be9dab22d in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#10 0x00007f6bec78e380 in Kopete::AppearanceSettings::usrWriteConfig () from /usr/lib64/libkopete.so.4
#11 0x00007f6bea37a784 in KCoreConfigSkeleton::writeConfig () from /usr/lib64/libkdecore.so.5
#12 0x00007f6bd87a8493 in ?? () from /usr/lib64/kde4/kcm_kopete_chatwindowconfig.so
#13 0x00007f6be6506037 in KCModuleProxy::save () from /usr/lib64/libkutils.so.4
#14 0x00007f6be6500df0 in ?? () from /usr/lib64/libkutils.so.4
#15 0x00007f6be6500fa7 in KCMultiDialog::slotOkClicked () from /usr/lib64/libkutils.so.4
#16 0x00007f6be65030d8 in KCMultiDialog::qt_metacall () from /usr/lib64/libkutils.so.4
#17 0x00007f6be651b685 in KSettings::Dialog::qt_metacall () from /usr/lib64/libkutils.so.4
#18 0x00007f6be9dab22d in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#19 0x00007f6bea8c3bb8 in KDialog::slotButtonClicked () from /usr/lib64/libkdeui.so.5
#20 0x00007f6bea8c4ecd in KDialog::qt_metacall () from /usr/lib64/libkdeui.so.5
#21 0x00007f6bea979db6 in KPageDialog::qt_metacall () from /usr/lib64/libkdeui.so.5
#22 0x00007f6be6503025 in KCMultiDialog::qt_metacall () from /usr/lib64/libkutils.so.4
#23 0x00007f6be651b685 in KSettings::Dialog::qt_metacall () from /usr/lib64/libkutils.so.4
#24 0x00007f6be9dab22d in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#25 0x00007f6be9daf41e in QSignalMapper::mapped () from /usr/lib64/qt4/libQtCore.so.4
#26 0x00007f6be9daf4c0 in QSignalMapper::map () from /usr/lib64/qt4/libQtCore.so.4
#27 0x00007f6be9db06b0 in QSignalMapper::qt_metacall () from /usr/lib64/qt4/libQtCore.so.4
#28 0x00007f6be9dab22d in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#29 0x00007f6be9459ac7 in QAbstractButton::clicked () from /usr/lib64/qt4/libQtGui.so.4
#30 0x00007f6be91f65eb in ?? () from /usr/lib64/qt4/libQtGui.so.4
#31 0x00007f6be91f74a2 in ?? () from /usr/lib64/qt4/libQtGui.so.4
#32 0x00007f6be91f76d5 in QAbstractButton::mouseReleaseEvent () from /usr/lib64/qt4/libQtGui.so.4
#33 0x00007f6be8f0e670 in QWidget::event () from /usr/lib64/qt4/libQtGui.so.4
#34 0x00007f6be8ec0f7d in QApplicationPrivate::notify_helper () from /usr/lib64/qt4/libQtGui.so.4
#35 0x00007f6be8eca0db in QApplication::notify () from /usr/lib64/qt4/libQtGui.so.4
#36 0x00007f6bea94efeb in KApplication::notify () from /usr/lib64/libkdeui.so.5
#37 0x00007f6be9d98e0b in QCoreApplication::notifyInternal () from /usr/lib64/qt4/libQtCore.so.4
#38 0x00007f6be8ec9388 in QApplicationPrivate::sendMouseEvent () from /usr/lib64/qt4/libQtGui.so.4
#39 0x00007f6be8f240ac in ?? () from /usr/lib64/qt4/libQtGui.so.4
#40 0x00007f6be8f22be5 in QApplication::x11ProcessEvent () from /usr/lib64/qt4/libQtGui.so.4
#41 0x00007f6be8f47a4c in ?? () from /usr/lib64/qt4/libQtGui.so.4
#42 0x00007f6be4cd389a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#43 0x00007f6be4cd704d in ?? () from /usr/lib/libglib-2.0.so.0
#44 0x00007f6be4cd720b in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#45 0x00007f6be9dbe2af in QEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#46 0x00007f6be8f4730f in ?? () from /usr/lib64/qt4/libQtGui.so.4
#47 0x00007f6be9d977c2 in QEventLoop::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#48 0x00007f6be9d97955 in QEventLoop::exec () from /usr/lib64/qt4/libQtCore.so.4
#49 0x00007f6be9d999cc in QCoreApplication::exec () from /usr/lib64/qt4/libQtCore.so.4
#50 0x000000000044952c in _start ()