Plasma from KDE 4.2.1-3.FC10 segfaults at KDE startup (Fedora 10 / x86_64)

[Chris January]

I have installed KDE 4.2.1-3.FC10 from the kde-redhat kde-testing
repository and plasma segfaults when KDE is
starting up. Can anyone tell me how to work out what's wrong?

I have also opened a kde-redhat Sourceforge bug tracker ticket:
2667738 but I'm not sure if that's the correct place to report bugs.

Backtrace:
This backtrace appears to be of no use.
This is probably because your packages are built in a way which prevents
creation of proper backtraces, or the stack frame was seriously corrupted
in the crash.

(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0x7feeda9e5840 (LWP 10713)]
0x0000003b7c4a7f50 in __nanosleep_nocancel () from /lib64/libc.so.6
[Current thread is 1 (Thread 0x7feeda9e5840 (LWP 10713))]

Thread 1 (Thread 0x7feeda9e5840 (LWP 10713)):
#0 0x0000003b7c4a7f50 in __nanosleep_nocancel () from /lib64/libc.so.6
#1 0x0000003b7c4a7da7 in __sleep (seconds=<value optimized out>) at
../sysdeps/unix/sysv/linux/sleep.c:138
#2 0x0000003f1746731f in ?? () from /usr/lib64/libkdeui.so.5
#3 0x0000003f17467c7a in KCrash::defaultCrashHandler () from
/usr/lib64/libkdeui.so.5
#4 <signal handler called>
#5 QTimer::stop (this=0x0) at kernel/qtimer.cpp:246
#6 0x000000000014c750 in ?? () from /usr/lib64/libkdeinit4_plasma.so
#7 0x000000000014e8c0 in ?? () from /usr/lib64/libkdeinit4_plasma.so
#8 0x0000003f14f59082 in QMetaObject::activate (sender=0x1cec4d0,
from_signal_index=<value optimized out>, to_signal_index=40, argv=0x4af) at
kernel/qobject.cpp:3069
#9 0x0000003f1ad18258 in ?? () from /usr/lib64/libplasma.so.3
#10 0x0000003f1ad17899 in Plasma::View::qt_metacall () from
/usr/lib64/libplasma.so.3
#11 0x000000000014e865 in ?? () from /usr/lib64/libkdeinit4_plasma.so
#12 0x0000003f14f59082 in QMetaObject::activate (sender=0x193e850,
from_signal_index=<value optimized out>, to_signal_index=6, argv=0x4af) at
kernel/qobject.cpp:3069
#13 0x0000003f1acaddf8 in Plasma::Applet::itemChange () from
/usr/lib64/libplasma.so.3
#14 0x0000003f1acb9738 in Plasma::Containment::itemChange () from
/usr/lib64/libplasma.so.3
#15 0x0000003f1695b232 in QGraphicsItemPrivate::setPosHelper (this=<value
optimized out>, pos=<value optimized out>, update=true) at
graphicsview/qgraphicsitem.cpp:2364
#16 0x0000003f1acb92c5 in ?? () from /usr/lib64/libplasma.so.3
#17 0x0000003f1acb981f in Plasma::Containment::resizeEvent () from
/usr/lib64/libplasma.so.3
#18 0x0000003f169a2278 in QGraphicsWidget::event (this=0x193e850,
event=0x7fffe2a292d0) at graphicsview/qgraphicswidget.cpp:1249
#19 0x0000003f1638e7dd in QApplicationPrivate::notify_helper
(this=0x1750c80, receiver=0x193e850, e=0x7fffe2a292d0) at
kernel/qapplication.cpp:4084
#20 0x0000003f163969ca in QApplication::notify (this=0x1737aa0,
receiver=0x193e850, e=0x7fffe2a292d0) at kernel/qapplication.cpp:4049
#21 0x0000003f17404f3b in KApplication::notify () from
/usr/lib64/libkdeui.so.5
#22 0x0000003f14f435ec in QCoreApplication::notifyInternal (this=0x1737aa0,
receiver=0x193e850, event=0x7fffe2a292d0) at
kernel/qcoreapplication.cpp:602
#23 0x0000003f169a3156 in QGraphicsWidget::setGeometry (this=0x193e850,
rect=@0x7fffe2a29450) at graphicsview/qgraphicswidget.cpp:401
#24 0x0000003f169a0ab9 in QGraphicsWidget::resize (this=0x193e850,
size=@0x7fffe2a29770) at graphicsview/qgraphicswidget.cpp:331
#25 0x000000000014dfe6 in ?? () from /usr/lib64/libkdeinit4_plasma.so
#26 0x000000000014eed9 in ?? () from /usr/lib64/libkdeinit4_plasma.so
#27 0x0000000000153562 in ?? () from /usr/lib64/libkdeinit4_plasma.so
#28 0x0000000000153741 in ?? () from /usr/lib64/libkdeinit4_plasma.so
#29 0x00000000001558c7 in ?? () from /usr/lib64/libkdeinit4_plasma.so
#30 0x0000003f14f59082 in QMetaObject::activate (sender=0x17468b0,
from_signal_index=<value optimized out>, to_signal_index=23, argv=0x4af) at
kernel/qobject.cpp:3069
#31 0x0000003f1acc4a1f in Plasma::Corona::containmentAdded () from
/usr/lib64/libplasma.so.3
#32 0x0000003f1acc623b in Plasma::Corona::loadLayout () from
/usr/lib64/libplasma.so.3
#33 0x0000003f1acc71e2 in Plasma::Corona::initializeLayout () from
/usr/lib64/libplasma.so.3
#34 0x0000000000152318 in ?? () from /usr/lib64/libkdeinit4_plasma.so
#35 0x0000000000154485 in ?? () from /usr/lib64/libkdeinit4_plasma.so
#36 0x00000000001558e8 in ?? () from /usr/lib64/libkdeinit4_plasma.so
#37 0x0000003f14f59082 in QMetaObject::activate (sender=0x18c6d00,
from_signal_index=<value optimized out>, to_signal_index=4, argv=0x4af) at
kernel/qobject.cpp:3069
#38 0x0000003f14f5e3bf in QSingleShotTimer::timerEvent (this=0x18c6d00) at
kernel/qtimer.cpp:298
#39 0x0000003f14f53363 in QObject::event (this=0x18c6d00, e=0x193e850) at
kernel/qobject.cpp:1082
#40 0x0000003f1638e7dd in QApplicationPrivate::notify_helper
(this=0x1750c80, receiver=0x18c6d00, e=0x7fffe2a2a6e0) at
kernel/qapplication.cpp:4084
#41 0x0000003f163969ca in QApplication::notify (this=0x1737aa0,
receiver=0x18c6d00, e=0x7fffe2a2a6e0) at kernel/qapplication.cpp:4049
#42 0x0000003f17404f3b in KApplication::notify () from
/usr/lib64/libkdeui.so.5
#43 0x0000003f14f435ec in QCoreApplication::notifyInternal (this=0x1737aa0,
receiver=0x18c6d00, event=0x7fffe2a2a6e0) at
kernel/qcoreapplication.cpp:602
#44 0x0000003f14f70686 in QCoreApplication::sendEvent () at
kernel/qcoreapplication.h:213
#45 QTimerInfoList::activateTimers (this=0x1753f50) at
kernel/qeventdispatcher_unix.cpp:572
#46 0x0000003f14f6cd9d in timerSourceDispatch (source=<value optimized
out>) at kernel/qeventdispatcher_glib.cpp:164
#47 0x000000342da3779b in g_main_dispatch () at gmain.c:2144
#48 IA__g_main_context_dispatch (context=0x1753180) at gmain.c:2697
#49 0x000000342da3af6d in g_main_context_iterate (context=0x1753180,
block=1, dispatch=1, self=<value optimized out>) at gmain.c:2778
#50 0x000000342da3b12b in IA__g_main_context_iteration (context=0x1753180,
may_block=1) at gmain.c:2841
#51 0x0000003f14f6ccff in QEventDispatcherGlib::processEvents
(this=0x1727280, flags=<value optimized out>) at
kernel/qeventdispatcher_glib.cpp:323
#52 0x0000003f164253df in QGuiEventDispatcherGlib::processEvents (this=0x0,
flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#53 0x0000003f14f41e92 in QEventLoop::processEvents (this=<value optimized
out>, flags=) at kernel/qeventloop.cpp:149
#54 0x0000003f14f4225d in QEventLoop::exec (this=0x7fffe2a2a990, flags=) at
kernel/qeventloop.cpp:200
#55 0x0000003f14f44524 in QCoreApplication::exec () at
kernel/qcoreapplication.cpp:880
#56 0x000000000014421b in kdemain () from /usr/lib64/libkdeinit4_plasma.so
#57 0x0000003b7c41e576 in __libc_start_main (main=0x400830 <_start+240>,
argc=1, ubp_av=0x7fffe2a2ac98, init=0x400860 <__libc_csu_init>, fini=<value
optimized out>, rtld_fini=<value optimized out>,
stack_end=0x7fffe2a2ac88) at libc-start.c:220
#58 0x0000000000400769 in _start ()

Regards,
Chris January