Version:            (using KDE KDE 3.4.1)
Installed from:    Gentoo Packages

I started KMail, the kwallet password dialog popped up, I typed my password without noticing that the kwallet dialog didn't have the focus (so don't ask me what program got the input), retyped the password, hit return, and this was the result:

Using host libthread_db library "/lib/libthread_db.so.1".
`system-supplied DSO at 0xffffe000' has disappeared; keeping its symbols.
[Thread debugging using libthread_db enabled]
[New Thread -1236650320 (LWP 13187)]
[KCrash handler]
#4  0x83e58955 in ?? ()
#5  0x429f670f in QObject::connect () from /usr/qt/3/lib/libqt-mt.so.3
#6  0x429c0173 in QGuardedPtrPrivate::QGuardedPtrPrivate ()
   from /usr/qt/3/lib/libqt-mt.so.3
#7  0xb7cf3064 in QGuardedPtr (this=0xb721d740, o=0xb721d740)
    at qguardedptr.h:74
#8  0xb7e841f3 in KMCommand::slotStart (this=0x8649e08) at kmcommands.cpp:194
#9  0xb7e8468c in KMCommand::qt_invoke (this=0x8649e08, _id=140811784, 
    _o=0xb7ff3aa8) at kmcommands.moc:147
#10 0xb7e84c1b in KMForwardAttachedCommand::qt_invoke (this=0xb721d740, 
    _id=-1222518976, _o=0xb721d740) at kmcommands.moc:1755
#11 0x429f76f4 in QObject::activate_signal () from /usr/qt/3/lib/libqt-mt.so.3
#12 0x42d4942d in QSignal::signal () from /usr/qt/3/lib/libqt-mt.so.3
#13 0x42a11c53 in QSignal::activate () from /usr/qt/3/lib/libqt-mt.so.3
#14 0x42a195e3 in QSingleShotTimer::event () from /usr/qt/3/lib/libqt-mt.so.3
#15 0x42994c6f in QApplication::internalNotify ()
   from /usr/qt/3/lib/libqt-mt.so.3
#16 0x42994e0c in QApplication::notify () from /usr/qt/3/lib/libqt-mt.so.3
#17 0xb66274f5 in KApplication::notify (this=0xbffff120, receiver=0x8322b40, 
    event=0xbfffedf0) at kapplication.cpp:549
#18 0x4298840c in QEventLoop::activateTimers ()
   from /usr/qt/3/lib/libqt-mt.so.3
#19 0x42941e1b in QEventLoop::processEvents ()
   from /usr/qt/3/lib/libqt-mt.so.3
#20 0x429ab250 in QEventLoop::enterLoop () from /usr/qt/3/lib/libqt-mt.so.3
#21 0x429ab1a6 in QEventLoop::exec () from /usr/qt/3/lib/libqt-mt.so.3
#22 0x42993e1f in QApplication::exec () from /usr/qt/3/lib/libqt-mt.so.3
#23 0x0804aa5e in main (argc=-1222518976, argv=0xb721d740) at main.cpp:95

I can't reproduce it, it's the first time KMail crashed at startup.