Same thing for me, except that I am running Ubuntu Dapper and my traffic is routed over three ISP uplinks (with static routings according to port numbers). It worked again about an hour ago, but then broke after five minutes. I never encountered a Kopete segfault over the last months, it always worked on this kind of network configuration.
Backtrace after the disconnect:
#6 0xb59317e3 in Client::deleteStaticTasks ()
from /usr/lib/libkopete_oscar.so.2
#7 0xb595f22a in Client::close () from /usr/lib/libkopete_oscar.so.2
#8 0xb591e6d2 in OscarAccount::logOff () from /usr/lib/libkopete_oscar.so.2
#9 0xb591e7b7 in OscarAccount::disconnect ()
from /usr/lib/libkopete_oscar.so.2
#10 0xb599c72c in ICQAccount::setPresenceTarget ()
from /usr/lib/kde3/kopete_icq.so
#11 0xb599c844 in ICQAccount::setPresenceType ()
from /usr/lib/kde3/kopete_icq.so
#12 0xb599c93b in ICQAccount::setOnlineStatus ()
from /usr/lib/kde3/kopete_icq.so
#13 0xb7e3a7fa in Kopete::Account::qt_invoke () from /usr/lib/libkopete.so.1
#14 0xb7e3a920 in Kopete:
asswordedAccount::qt_invoke ()
from /usr/lib/libkopete.so.1
#15 0xb5924033 in OscarAccount::qt_invoke ()
from /usr/lib/libkopete_oscar.so.2
#16 0xb599ca28 in ICQAccount::qt_invoke () from /usr/lib/kde3/kopete_icq.so
#17 0xb6954e29 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#18 0xb7e0b930 in Kopete:
nlineStatusAction::activated ()
from /usr/lib/libkopete.so.1
#19 0xb7e0b9de in Kopete:
nlineStatusAction::slotActivated ()
from /usr/lib/libkopete.so.1
#20 0xb72cb0d6 in KAction::slotPopupActivated () from /usr/lib/libkdeui.so.4
#21 0xb72cb38b in KAction::qt_invoke () from /usr/lib/libkdeui.so.4
#22 0xb7e07005 in Kopete:
nlineStatusAction::qt_invoke ()
from /usr/lib/libkopete.so.1
#23 0xb6954e29 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#24 0xb6ce7e1a in QSignal::signal () from /usr/lib/libqt-mt.so.3
#25 0xb69725a0 in QSignal::activate () from /usr/lib/libqt-mt.so.3
#26 0xb6a79ebd in QPopupMenu::mouseReleaseEvent () from /usr/lib/libqt-mt.so.3
#27 0xb728581b in KPopupMenu::mouseReleaseEvent () from /usr/lib/libkdeui.so.4
#28 0xb698f5fd in QWidget::event () from /usr/lib/libqt-mt.so.3
#29 0xb68eadc6 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#30 0xb68eb350 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#31 0xb706fced in KApplication::notify () from /usr/lib/libkdecore.so.4
#32 0xb687c15d in QApplication::sendSpontaneousEvent ()
from /usr/lib/libqt-mt.so.3
#33 0xb6877558 in QETWidget::translateMouseEvent ()
from /usr/lib/libqt-mt.so.3
#34 0xb6875cf1 in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#35 0xb688f473 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#36 0xb69038b7 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#37 0xb69037da in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#38 0xb68e98d5 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#39 0x08078c52 in ?? ()
#40 0xbfb11220 in ?? ()
#41 0xbfb11354 in ?? ()
#42 0xbfb1134c in ?? ()
#43 0x00000000 in ?? ()