Version:           0.12.3 (using KDE 3.5.5, Arch Linux)
Compiler:          Target: i686-pc-linux-gnu
OS:                Linux (i686) release 2.6.19-beyond

- set up an IRC account
- connect to server
- join 2 channels
- add the channels to the contact list
- connect to one by clicking double on the contact-item (in main window of kopete)
- enjoy discussion
- close the window with the channel inside using [X] of the window (kde)
- message appears "You are about to leave the group chat session #somechannel @ irc.bluewin.ch - Fre....
You will not receive future messages from this conversation."
- Close Chat
=> kopete crashes:

[KCrash handler]
#9  0xb7e5fe67 in Kopete::ChatSession::members () from /opt/kde/lib/libkopete.so.1
#10 0xb57a0abb in IRCContact::qt_invoke () from /opt/kde/lib/kde3/kopete_irc.so
#11 0xb57a0f63 in IRCChannelContact::qt_invoke () from /opt/kde/lib/kde3/kopete_irc.so
#12 0xb6a8a150 in QObject::activate_signal () from /opt/qt/lib/libqt-mt.so.3
#13 0xb578764c in IRCContactManager::privateMessage () from /opt/kde/lib/kde3/kopete_irc.so
#14 0xb579cca2 in IRCContactManager::slotNewMessage () from /opt/kde/lib/kde3/kopete_irc.so
#15 0xb579ce1f in IRCContactManager::qt_invoke () from /opt/kde/lib/kde3/kopete_irc.so
#16 0xb6a8a1e9 in QObject::activate_signal () from /opt/qt/lib/libqt-mt.so.3
#17 0xb57ca8c6 in KIRC::Engine::incomingMessage () from /opt/kde/lib/kde3/kopete_irc.so
#18 0xb57d452d in KIRC::Engine::privmsg () from /opt/kde/lib/kde3/kopete_irc.so
#19 0xb57cf5eb in KIRC::Engine::qt_invoke () from /opt/kde/lib/kde3/kopete_irc.so
#20 0xb6a8a1e9 in QObject::activate_signal () from /opt/qt/lib/libqt-mt.so.3
#21 0xb57de1ee in KIRC::MessageRedirector::redirect () from /opt/kde/lib/kde3/kopete_irc.so
#22 0xb57de2d7 in KIRC::MessageRedirector::operator() () from /opt/kde/lib/kde3/kopete_irc.so
#23 0xb57cefba in KIRC::Engine::slotReadyRead () from /opt/kde/lib/kde3/kopete_irc.so
#24 0xb57d1487 in KIRC::Engine::qt_invoke () from /opt/kde/lib/kde3/kopete_irc.so
#25 0xb6a8a1e9 in QObject::activate_signal () from /opt/qt/lib/libqt-mt.so.3
#26 0xb6db232e in QSignal::signal () from /opt/qt/lib/libqt-mt.so.3
#27 0xb6aa5f55 in QSignal::activate () from /opt/qt/lib/libqt-mt.so.3
#28 0xb6aad243 in QSingleShotTimer::event () from /opt/qt/lib/libqt-mt.so.3
#29 0xb6a2be47 in QApplication::internalNotify () from /opt/qt/lib/libqt-mt.so.3
#30 0xb6a2cc0f in QApplication::notify () from /opt/qt/lib/libqt-mt.so.3
#31 0xb71225ce in KApplication::notify () from /opt/kde/lib/libkdecore.so.4
#32 0xb6a2133c in QEventLoop::activateTimers () from /opt/qt/lib/libqt-mt.so.3
#33 0xb69db55c in QEventLoop::processEvents () from /opt/qt/lib/libqt-mt.so.3
#34 0xb6a42721 in QEventLoop::enterLoop () from /opt/qt/lib/libqt-mt.so.3
#35 0xb6a425d6 in QEventLoop::exec () from /opt/qt/lib/libqt-mt.so.3
#36 0xb6a2baaf in QApplication::exec () from /opt/qt/lib/libqt-mt.so.3
#37 0x08083380 in ?? ()
#38 0xbfd989cc in ?? ()
#39 0xbfd98b00 in ?? ()
#40 0xbfd98af8 in ?? ()
#41 0x00000000 in ?? ()