Version:           2.1.0 (using 4.1.00 (KDE 4.1.0), Kubuntu packages)
Compiler:          gcc
OS:                Linux (i686) release 2.6.24-21-generic

When KDE "global progress tracking" is enabled and switched to "show every single download", when kget is downloading a file changing it to "show overall progress" would crash kget.

Backtrace:

Program: KGet (kget), sygnał SIGSEGV
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0xb5f76940 (LWP 13938)]
[KCrash handler]
#6  0xb7692ec9 in QMetaObject::indexOfSignal () from /usr/lib/libQtCore.so.4
#7  0xb76a2807 in QObject::disconnect () from /usr/lib/libQtCore.so.4
#8  0xb786ea3d in KJobTrackerInterface::unregisterJob (this=0x8421450, 
    job=0x83952a8)
    at /build/buildd/kde4libs-4.1.0/kdecore/jobs/kjobtrackerinterface.cpp:82
#9  0xb7d8c5f4 in KAbstractWidgetJobTracker::unregisterJob (this=0x8421450, 
    job=0x83952a8)
    at /build/buildd/kde4libs-4.1.0/kdeui/jobs/kabstractwidgetjobtracker.cpp:50
#10 0xb7d8f179 in KWidgetJobTracker::unregisterJob (this=0x8421450, 
    job=0x83952a8)
    at /build/buildd/kde4libs-4.1.0/kdeui/jobs/kwidgetjobtracker.cpp:93
#11 0xb7bcfc5c in ?? () from /usr/lib/kde4/lib/libkgetcore.so.4
#12 0xb7bb95f2 in KGet::reloadKJobs () from /usr/lib/kde4/lib/libkgetcore.so.4
#13 0x0808de75 in ?? ()
#14 0x0808fb3d in ?? ()
#15 0xb76a14f9 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#16 0xb76a1bc2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#17 0xb7cfdf93 in KConfigDialog::settingsChanged (this=0x8494cb0, 
    _t1=@0xbf8fac08)
    at /build/buildd/kde4libs-4.1.0/obj-i486-linux-gnu/kdeui/kconfigdialog.moc:103
#18 0xb7cfe537 in KConfigDialog::KConfigDialogPrivate::_k_settingsChangedSlot
    (this=0x85af938)
    at /build/buildd/kde4libs-4.1.0/kdeui/dialogs/kconfigdialog.cpp:243
#19 0xb7cfe7b5 in KConfigDialog::qt_metacall (this=0x8494cb0, 
    _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0xbf8face8)
    at /build/buildd/kde4libs-4.1.0/obj-i486-linux-gnu/kdeui/kconfigdialog.moc:86
#20 0x080627af in _start ()
#0  0xb7f08410 in __kernel_vsyscall ()

Hope this helps. ;)