Version:            (using KDE KDE 3.5.5)
Installed from:    Compiled From Sources
Compiler:          gcc (GCC) 4.1.1 (Gentoo 4.1.1-r3) 
OS:                Linux

I know this isn't technically a crash, but it's just as severe. I'm running Kopete 0.12.4 and Kopete immediately freezes on being started unless ExcludeConnect=true for my Yahoo account.

Here's the backtrace I got:

#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb651789e in __lll_mutex_lock_wait () from /lib/libpthread.so.0
#2  0xb65139cc in _L_mutex_lock_51 () from /lib/libpthread.so.0
#3  0xb65133cd in pthread_mutex_lock () from /lib/libpthread.so.0
#4  0xb6d44e4c in QRealMutexPrivate::lock () from /usr/qt/3/lib/libqt-mt.so.3
#5  0xb6d44cda in QMutex::lock () from /usr/qt/3/lib/libqt-mt.so.3
#6  0xb7184b26 in QMutexLocker (this=0xfffffffc, m=0x0) at /usr/qt/3/include/qmutex.h:96
#7  0xb717bbe3 in KNetwork::Internal::KResolverManager::dequeue (this=0x814d108, obj=0x814bfb0) at kresolvermanager.cpp:820
        locker = {mtx = 0x814d11c}
#8  0xb717fcf2 in KNetwork::KResolver::cancel (this=0x814bfb0, emitSignal=false) at kresolver.cpp:510
#9  0xb71801c6 in ~KResolver (this=0x814bfb0) at kresolver.cpp:307
#10 0xb718693b in ~KClientSocketBasePrivate (this=0x814bf80) at kclientsocketbase.cpp:40
#11 0xb71804d0 in ~KClientSocketBase (this=0x814bec0, __vtt_parm=0xb71b7548) at kclientsocketbase.cpp:61
#12 0xb7180740 in ~KStreamSocket (this=0x814bec0, __vtt_parm=0xb71b7544) at kstreamsocket.cpp:70
#13 0xb71807c5 in ~KBufferedSocket (this=0x814bec0) at kbufferedsocket.cpp:65
#14 0xb5e8e656 in SendPictureTask::~SendPictureTask () from /usr/kde/3.5/lib/kde3/kopete_yahoo.so
#15 0xb6aca468 in QObject::event () from /usr/qt/3/lib/libqt-mt.so.3
#16 0xb6a6fd7c in QApplication::internalNotify () from /usr/qt/3/lib/libqt-mt.so.3
#17 0xb6a70ad3 in QApplication::notify () from /usr/qt/3/lib/libqt-mt.so.3
#18 0xb7131c2d in KApplication::notify (this=0xbfa6b88c, receiver=0x814aeb8, event=0x813bad8) at kapplication.cpp:550
        t = DeferredDelete
        ic = (struct QPixmap *) 0x0
        _selectAll = (const KShortcut &) @0x0: <error reading variable>
#19 0xb6a71658 in QApplication::sendPostedEvents () from /usr/qt/3/lib/libqt-mt.so.3
#20 0xb6a717e6 in QApplication::sendPostedEvents () from /usr/qt/3/lib/libqt-mt.so.3
#21 0xb6a2273b in QEventLoop::processEvents () from /usr/qt/3/lib/libqt-mt.so.3
#22 0xb6a8588d in QEventLoop::enterLoop () from /usr/qt/3/lib/libqt-mt.so.3
#23 0xb6a85732 in QEventLoop::exec () from /usr/qt/3/lib/libqt-mt.so.3
#24 0xb6a6f9ad in QApplication::exec () from /usr/qt/3/lib/libqt-mt.so.3
#25 0x0807c955 in main ()
#26 0xb61fe824 in __libc_start_main () from /lib/libc.so.6
#27 0x0806c7c1 in _start ()