This bug seems to be similar. Kopete crashes on startup. The backtrace tells also something about MSN... Using: Kubuntu Hardy Heron (KDE 3.5.10) Installed package: 4:3.5.10-0ubuntu1~hardy1 Here is what I could get out of it: (no debugging symbols found) [Thread debugging using libthread_db enabled] [New Thread 0xb5ff36c0 (LWP 637)] [KCrash handler] #6 0xb67d2052 in QShared::ref (this=0x1) at ../include/qshared.h:52 #7 0xb6bc702d in QString (this=0xbff60f08, s=@0x833f030) at tools/qstring.cpp:1400 #8 0xb7e0c00f in Kopete::Contact::contactId () from /usr/lib/libkopete.so.1 #9 0xb557a01b in MSNNotifySocket::parseCommand () from /usr/lib/libkopete_msn_shared.so.0 #10 0xb556352b in MSNSocket::parseLine () from /usr/lib/libkopete_msn_shared.so.0 #11 0xb5564fa2 in MSNSocket::slotReadLine () from /usr/lib/libkopete_msn_shared.so.0 #12 0xb556723d in MSNSocket::slotDataReceived () from /usr/lib/libkopete_msn_shared.so.0 #13 0xb556989d in MSNSocket::qt_invoke () from /usr/lib/libkopete_msn_shared.so.0 #14 0xb557703f in MSNNotifySocket::qt_invoke () from /usr/lib/libkopete_msn_shared.so.0 #15 0xb68ae704 in QObject::activate_signal (this=0x86da7f8, clist=0x87302f8, o=0xbff61488) at kernel/qobject.cpp:2359 #16 0xb68af1e9 in QObject::activate_signal (this=0x86da7f8, signal=9) at kernel/qobject.cpp:2328 #17 0xb7030b8c in KNetwork::KClientSocketBase::readyRead (this=0x86da7f8) at ./kclientsocketbase.moc:192 #18 0xb7030bc6 in KNetwork::KClientSocketBase::slotReadActivity (this=0x1) at /build/buildd/kdelibs-3.5.10/./kdecore/network/kclientsocketbase.cpp:416 #19 0xb7036378 in KNetwork::KBufferedSocket::slotReadActivity ( this=0xbff61488) at /build/buildd/kdelibs-3.5.10/./kdecore/network/kbufferedsocket.cpp:354 #20 0xb7044399 in KNetwork::KBufferedSocket::qt_invoke (this=0x86da7f8, _id=8, _o=0xbff615b0) at ./kbufferedsocket.moc:97 #21 0xb68ae704 in QObject::activate_signal (this=0x86ee9b8, clist=0x86a1cb0, o=0xbff615b0) at kernel/qobject.cpp:2359 #22 0xb68af051 in QObject::activate_signal (this=0x86ee9b8, signal=2, param=19) at kernel/qobject.cpp:2452 #23 0xb6c3eb99 in QSocketNotifier::activated (this=0x86ee9b8, t0=19) at .moc/debug-shared-mt/moc_qsocketnotifier.cpp:85 #24 0xb68d0766 in QSocketNotifier::event (this=0x86ee9b8, e=0xbff618c0) at kernel/qsocketnotifier.cpp:261 #25 0xb6842c36 in QApplication::internalNotify (this=0xbff61b84, receiver=0x86ee9b8, e=0xbff618c0) at kernel/qapplication.cpp:2638 #26 0xb6844a5f in QApplication::notify (this=0xbff61b84, receiver=0x86ee9b8, e=0xbff618c0) at kernel/qapplication.cpp:2361 #27 0xb70039b2 in KApplication::notify (this=0xbff61b84, receiver=0x86ee9b8, event=0xbff618c0) at /build/buildd/kdelibs-3.5.10/./kdecore/kapplication.cpp:550 #28 0xb67d328d in QApplication::sendEvent (receiver=0x86ee9b8, event=0xbff618c0) at ../include/qapplication.h:523 #29 0xb6834b4a in QEventLoop::activateSocketNotifiers (this=0x81680a0) at kernel/qeventloop_unix.cpp:581 #30 0xb67e8630 in QEventLoop::processEvents (this=0x81680a0, flags=4) at kernel/qeventloop_x11.cpp:386 #31 0xb685df90 in QEventLoop::enterLoop (this=0x81680a0) at kernel/qeventloop.cpp:201 #32 0xb685dc8e in QEventLoop::exec (this=0x81680a0) at kernel/qeventloop.cpp:148 #33 0xb68447df in QApplication::exec (this=0xbff61b84) at kernel/qapplication.cpp:2761 #34 0x0807fc73 in ?? () #35 0xb6056450 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6 #36 0x0806f071 in ?? ()