Version:            (using KDE KDE 3.5.1)
Installed from:    Ubuntu Packages
Compiler:          gcc-4.00 
OS:                Linux

When closing krfb, I got a crash notification. I continued getting this notofication constantly, and even after rebooting.

Here is the report:

(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread 1989310144 (LWP 5265)]
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[KCrash handler]
#6  0xffffe410 in __kernel_vsyscall ()
#7  0x77d0e9a1 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0x77d102b9 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0x77d07f51 in __assert_fail () from /lib/tls/i686/cmov/libc.so.6
#10 0x7659b995 in avahi_client_get_state () from /usr/lib/libavahi-client.so.3
#11 0x765bfcf6 in DNSSD::PublicService::publishAsync ()
   from /usr/lib/libkdnssd.so.1
#12 0x765f6ee4 in PortListener::dnssdRegister ()
   from /usr/lib/kde3/kded_kinetd.so
#13 0x765f9097 in PortListener::acquirePort ()
   from /usr/lib/kde3/kded_kinetd.so
#14 0x765fb08f in PortListener::PortListener ()
   from /usr/lib/kde3/kded_kinetd.so
#15 0x765fb23b in KInetD::loadServiceList () from /usr/lib/kde3/kded_kinetd.so
#16 0x765fb4d3 in KInetD::KInetD () from /usr/lib/kde3/kded_kinetd.so
#17 0x765fb552 in create_kinetd () from /usr/lib/kde3/kded_kinetd.so
#18 0x77f25219 in Kded::loadModule () from /usr/lib/libkdeinit_kded.so
#19 0x77f26382 in Kded::initModules () from /usr/lib/libkdeinit_kded.so
#20 0x77f26407 in Kded::qt_invoke () from /usr/lib/libkdeinit_kded.so
#21 0x76ecb2d5 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#22 0x7725a37e in QSignal::signal () from /usr/lib/libqt-mt.so.3
#23 0x76ee8a34 in QSignal::activate () from /usr/lib/libqt-mt.so.3
#24 0x76ef0524 in QSingleShotTimer::event () from /usr/lib/libqt-mt.so.3
#25 0x76e616c2 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#26 0x76e618b4 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#27 0x77603c7d in KApplication::notify () from /usr/lib/libkdecore.so.4
#28 0x76df2993 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#29 0x76e530af in QEventLoop::activateTimers () from /usr/lib/libqt-mt.so.3
#30 0x76e0677f in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#31 0x76e7a1bb in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#32 0x76e7a0de in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#33 0x76e601d1 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#34 0x77f24450 in kdemain () from /usr/lib/libkdeinit_kded.so
#35 0x77cfaea2 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#36 0x080483b1 in ?? ()