Version:            (using Devel)
OS:                Linux
Installed from:    Compiled sources

after upgrading from F10 kde 4.1 to kde 4.2(rc1) when I try to login the kde plasma worksapce and window decoration crashes, and i got the following:

# cat kde4-window-decorator1.kcrash
Application: KDE Window Decorator (kde4-window-decorator), signal SIGSEGV
[Current thread is 1 (Thread 0xb800f770 (LWP 3793))]

Thread 1 (Thread 0xb800f770 (LWP 3793)):
[KCrash Handler]
#6  0x00123991 in KDecorationUnstable::shadowsActive () from /usr/lib/libkdecorations.so.4
#7  0x00128b55 in KCommonDecorationUnstable::shadowsActive () from /usr/lib/libkdecorations.so.4
#8  0x02c0a0f7 in KColorUtils::darken () from /usr/lib/kde4/kwin3_oxygen.so
#9  0x0012add6 in KCommonDecoration::resizeEvent () from /usr/lib/libkdecorations.so.4
#10 0x00129072 in KCommonDecoration::eventFilter () from /usr/lib/libkdecorations.so.4
#11 0x0213b3aa in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib/libQtCore.so.4
#12 0x0324760a in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#13 0x0324f53a in QApplication::notify () from /usr/lib/libQtGui.so.4
#14 0x0110bfcd in KApplication::notify () from /usr/lib/libkdeui.so.5
#15 0x0213c1c1 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#16 0x03299ddc in QWidgetPrivate::sendPendingMoveAndResizeEvents () from /usr/lib/libQtGui.so.4
#17 0x032a24e6 in QWidgetPrivate::show_helper () from /usr/lib/libQtGui.so.4
#18 0x032a2ba3 in QWidget::setVisible () from /usr/lib/libQtGui.so.4
#19 0x032a2978 in QWidgetPrivate::showChildren () from /usr/lib/libQtGui.so.4
#20 0x032a2511 in QWidgetPrivate::show_helper () from /usr/lib/libQtGui.so.4
#21 0x032a2ba3 in QWidget::setVisible () from /usr/lib/libQtGui.so.4
#22 0x0805bb3c in ?? ()
#23 0x0805cbfc in ?? ()
#24 0x080611a1 in ?? ()
#25 0x08058a54 in ?? ()
#26 0x08051175 in Plasma::Theme::font ()
#27 0x00dfc6e5 in __libc_start_main () from /lib/libc.so.6
#28 0x08050161 in Plasma::Theme::font ()


Guy.