I build kde-4.10.0 from source in VectorLinux-7.0 (a slackware based distro) and plasma crash every time i login...below is the crash report...

Application: plasma-desktop (0.4)
KDE Platform Version: 4.10.00
Qt Version: 4.8.4
Operating System: Linux 3.2.22 x86_64

-- Information about the crash:
<In detail, tell us what you were doing  when the application crashed.>

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f2c327d67a0 (LWP 3612))]

Thread 3 (Thread 0x7f2c113a2700 (LWP 3783)):
#0  0x00007f2c30db1b7c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f2c23d6f3e4 in ?? () from /usr/lib64/qt/lib/libQtScript.so.4
#2  0x00007f2c23d6f419 in ?? () from /usr/lib64/qt/lib/libQtScript.so.4
#3  0x00007f2c30dacd6b in start_thread () from /lib64/libpthread.so.0
#4  0x00007f2c2f3d181d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f2b8ff03700 (LWP 3784)):
#0  0x00007fff473ff928 in ?? ()
#1  0x00007f2c2bc291ab in clock_gettime () from /lib64/librt.so.1
#2  0x00007f2c310a7832 in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#3  0x00007f2c31183c3d in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#4  0x00007f2c31183fb5 in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#5  0x00007f2c3118294c in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#6  0x00007f2c311829f5 in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#7  0x00007f2c2b948ad7 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#8  0x00007f2c2b9498f9 in ?? () from /usr/lib64/libglib-2.0.so.0
#9  0x00007f2c2b949f41 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#10 0x00007f2c311831c6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt/lib/libQtCore.so.4
#11 0x00007f2c31152922 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt/lib/libQtCore.so.4
#12 0x00007f2c31152bdd in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt/lib/libQtCore.so.4
#13 0x00007f2c3104c938 in QThread::exec() () from /usr/lib64/qt/lib/libQtCore.so.4
#14 0x00007f2c311311c8 in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#15 0x00007f2c3104f006 in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#16 0x00007f2c30dacd6b in start_thread () from /lib64/libpthread.so.0
#17 0x00007f2c2f3d181d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f2c327d67a0 (LWP 3612)):
[KCrash Handler]
#6  0x00007f2c2359abd4 in ?? () from /usr/lib64/qt/lib/libQtDeclarative.so.4
#7  0x00007f2c31037aa9 in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#8  0x00007f2c310352c0 in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#9  0x00007f2c31035532 in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#10 0x00007f2c31038469 in QPropertyAnimation::updateState(QAbstractAnimation::State, QAbstractAnimation::State) () from /usr/lib64/qt/lib/libQtCore.so.4
#11 0x00007f2c310333a6 in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#12 0x00007f2c25e45743 in Plasma::ItemBackground::itemChange(QGraphicsItem::GraphicsItemChange, QVariant const&) () from /usr/lib64/libplasma.so.3
#13 0x00007f2c3087e6cd in QGraphicsItemPrivate::setVisibleHelper(bool, bool, bool) () from /usr/lib64/qt/lib/libQtGui.so.4
#14 0x00007f2c3087e93d in QGraphicsItemPrivate::setVisibleHelper(bool, bool, bool) () from /usr/lib64/qt/lib/libQtGui.so.4
#15 0x00007f2c3087f2af in QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem*, QVariant const*, QVariant const*) () from /usr/lib64/qt/lib/libQtGui.so.4
#16 0x00007f2c3087f854 in QGraphicsItem::setParentItem(QGraphicsItem*) () from /usr/lib64/qt/lib/libQtGui.so.4
#17 0x00007f2b8ee9346b in ?? () from /usr/lib64/kde4/imports/org/kde/plasma/core/libcorebindingsplugin.so
#18 0x00007f2c31168936 in QObject::event(QEvent*) () from /usr/lib64/qt/lib/libQtCore.so.4
#19 0x00007f2c3028be64 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/qt/lib/libQtGui.so.4
#20 0x00007f2c302909ef in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/qt/lib/libQtGui.so.4
#21 0x00007f2c321bd046 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#22 0x00007f2c31153bac in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/qt/lib/libQtCore.so.4
#23 0x00007f2c311571d8 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/qt/lib/libQtCore.so.4
#24 0x00007f2c31182fd3 in ?? () from /usr/lib64/qt/lib/libQtCore.so.4
#25 0x00007f2c2b94955f in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#26 0x00007f2c2b949d68 in ?? () from /usr/lib64/libglib-2.0.so.0
#27 0x00007f2c2b949f41 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#28 0x00007f2c3118316f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt/lib/libQtCore.so.4
#29 0x00007f2c30331f9e in ?? () from /usr/lib64/qt/lib/libQtGui.so.4
#30 0x00007f2c31152922 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt/lib/libQtCore.so.4
#31 0x00007f2c31152bdd in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt/lib/libQtCore.so.4
#32 0x00007f2c3115767b in QCoreApplication::exec() () from /usr/lib64/qt/lib/libQtCore.so.4
#33 0x00007f2c1ee7ecd9 in kdemain () from /usr/lib64/libkdeinit4_plasma-desktop.so
#34 0x0000000000407205 in _start ()

Report to https://bugs.kde.org/

Reproducible: Always

Steps to Reproduce:
1. Relogin to desktop or manually create a new panel
2.
3.
Actual Results:  
plasma crash

Expected Results:  
no crash

This is my plasma-desktop-appletsrc

[ActionPlugins]
MidButton;NoModifier=paste
RightButton;NoModifier=contextmenu
wheel:Vertical;NoModifier=switchdesktop

[Containments][1]
activity=
activityId=
desktop=-1
formfactor=2
geometry=0,-41,1024,35
immutability=1
lastDesktop=-1
lastScreen=0
location=4
plugin=panel
screen=0
zvalue=0

[Containments][1][ActionPlugins]
RightButton;NoModifier=contextmenu

[Containments][1][Applets][5][Configuration][Launchers]
browser=preferred://browser, , ,\s
filemanager=preferred://filemanager, , ,\s

[Containments][1][Applets][6][Configuration][Applets][8]
plugin=notifications

[Containments][1][Configuration]
maximumSize=1024,35
minimumSize=1024,35

[Containments][8]
ActionPluginsSource=Global
activity=Desktop
activityId=bc4cee5f-46db-430c-8c09-839dd8a42026
desktop=-1
formfactor=0
geometry=0,0,1024,768
immutability=1
lastDesktop=-1
lastScreen=0
location=0
plugin=desktop
screen=0
wallpaperplugin=image
wallpaperpluginmode=SingleImage
zvalue=0

[Containments][8][Wallpaper][image]
slideTimer=10
slidepaths=/usr/share/wallpapers/
userswallpapers=
wallpaper=/usr/share/wallpapers/Elarun
wallpapercolor=0,0,0
wallpaperposition=0

[Containments][9]
ActionPluginsSource=Global
activity=New Activity
activityId=a95723e5-d633-4d88-8313-71bae0188cef
desktop=-1
formfactor=0
geometry=1030,0,1024,768
immutability=1
lastDesktop=-1
lastScreen=0
location=0
plugin=desktop
screen=-1
wallpaperplugin=image
wallpaperpluginmode=SingleImage
zvalue=0