Version:           trunk (using Devel)
Compiler:          gcc 4.3.2
Gentoo 4.3.2-r3 p1.6, pie-10.1.5 
OS:                Linux
Installed from:    Compiled sources

Set Maximum Rows to 2
Enable "Force row settings"
start vlc
Disable "Force row settings"
Close vlc -> plasma crash

Here is a little Youtube Video:
http://www.youtube.com/watch?v=Vay4ot0JWTQ


Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f0607fa5790 (LWP 7907))]

Thread 2 (Thread 0x4122a950 (LWP 7908)):
#0  0x00007f06053b5d79 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f0605624ab5 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f060698ab24 in ?? () from /usr/lib64/qt4/libQtNetwork.so.4
#3  0x00007f0605623ef4 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f06053b2038 in start_thread () from /lib/libpthread.so.0
#5  0x00007f0602643a1d in clone () from /lib/libc.so.6

Thread 1 (Thread 0x7f0607fa5790 (LWP 7907)):
[KCrash Handler]
#5  0x00007f05e76acf80 in ?? () from /usr/kde/live/lib64/libtaskmanager.so.4
#6  0x00007f05e76acfe3 in ?? () from /usr/kde/live/lib64/libtaskmanager.so.4
#7  0x00007f05e76c8225 in TaskManager::TaskGroup::remove(TaskManager::AbstractGroupableItem*) () from /usr/kde/live/lib64/libtaskmanager.so.4
#8  0x00007f05e76b0991 in ?? () from /usr/kde/live/lib64/libtaskmanager.so.4
#9  0x00007f05e76b1a0d in TaskManager::GroupManager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/kde/live/lib64/libtaskmanager.so.4
#10 0x00007f060571aca5 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#11 0x00007f05e76ca305 in TaskManager::TaskManager::taskRemoved(KSharedPtr<TaskManager::Task>) () from /usr/kde/live/lib64/libtaskmanager.so.4
#12 0x00007f05e76caf83 in TaskManager::TaskManager::windowRemoved(unsigned long) () from /usr/kde/live/lib64/libtaskmanager.so.4
#13 0x00007f05e76cbb17 in TaskManager::TaskManager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/kde/live/lib64/libtaskmanager.so.4
#14 0x00007f060571aca5 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#15 0x00007f06063b2dc2 in KWindowSystem::windowRemoved(unsigned long) () from /usr/kde/live/lib64/libkdeui.so.5
#16 0x00007f06063b52fb in ?? () from /usr/kde/live/lib64/libkdeui.so.5
#17 0x00007f06063c2de6 in NETRootInfo::update(unsigned long const*) () from /usr/kde/live/lib64/libkdeui.so.5
#18 0x00007f06063c3111 in NETRootInfo::event(_XEvent*, unsigned long*, int) () from /usr/kde/live/lib64/libkdeui.so.5
#19 0x00007f06063b5623 in ?? () from /usr/kde/live/lib64/libkdeui.so.5
#20 0x00007f06062a90f5 in KApplication::x11EventFilter(_XEvent*) () from /usr/kde/live/lib64/libkdeui.so.5
#21 0x00007f0607c988c4 in ?? () from /usr/kde/live/lib64/libkdeinit4_plasma-desktop.so
#22 0x00007f0604823b8f in ?? () from /usr/lib64/qt4/libQtGui.so.4
#23 0x00007f06048315bd in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#24 0x00007f0604857fc4 in ?? () from /usr/lib64/qt4/libQtGui.so.4
#25 0x00007f05ff34d6ba in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#26 0x00007f05ff350e6d in ?? () from /usr/lib/libglib-2.0.so.0
#27 0x00007f05ff35102b in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#28 0x00007f060572d3cf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#29 0x00007f060485781f in ?? () from /usr/lib64/qt4/libQtGui.so.4
#30 0x00007f0605704072 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#31 0x00007f060570420c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#32 0x00007f0605708d5e in QCoreApplication::exec() () from /usr/lib64/qt4/libQtCore.so.4
#33 0x00007f0607c83c8b in kdemain () from /usr/kde/live/lib64/libkdeinit4_plasma-desktop.so
#34 0x00007f06025934ca in __libc_start_main () from /lib/libc.so.6
#35 0x0000000000400939 in _start ()