Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    Ubuntu Packages

I downloaded Florians 4-way language lessions for German, Russian, Spanish, and Arabic (this is the newest one - 04-2008) and since I am only interested in the Arabic lessons, I tried removing the other 3 and the application crashed.

Steps to reproduce:
1. Download from the Kde4 "Get New..."
2. Remove any of the languages

Debug:

Application: Parley (parley), signal SIGSEGV

Thread 1 (Thread 0xb55b0700 (LWP 5967)):
[KCrash Handler]
#6  0xb764cf6a in QString::operator= () from /usr/lib/libQtCore.so.4
#7  0xb7f54fa9 in KEduVocIdentifier::setLocale (this=0xb5d011a0, locale=@0xbf8c7bf8) at /build/buildd/kdeedu-4.2.2/libkdeedu/keduvocdocument/keduvocidentifier.cpp:100
#8  0x080a2474 in LanguagePropertiesPage::accept (this=0x91c0c08) at /build/buildd/kdeedu-4.2.2/parley/src/settings/languagepropertiespage.cpp:223
#9  0x080a34eb in LanguagePropertiesPage::qt_metacall (this=0x91c0c08, _c=QMetaObject::InvokeMetaMethod, _id=49, _a=0xbf8c7ca8)
    at /build/buildd/kdeedu-4.2.2/obj-i486-linux-gnu/parley/src/languagepropertiespage.moc:86
#10 0xb770fca8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0xb7710932 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#12 0xb671d377 in QDialog::accepted () from /usr/lib/libQtGui.so.4
#13 0xb671e6e0 in QDialog::done () from /usr/lib/libQtGui.so.4
#14 0xb671d23c in QDialog::accept () from /usr/lib/libQtGui.so.4
#15 0x080a0363 in LanguageProperties::accept (this=0xbf8c8f80) at /build/buildd/kdeedu-4.2.2/parley/src/settings/languageproperties.cpp:72
#16 0xb6c30033 in KDialog::slotButtonClicked () from /usr/lib/libkdeui.so.5
#17 0xb6c31374 in KDialog::qt_metacall () from /usr/lib/libkdeui.so.5
#18 0xb6cf703a in KPageDialog::qt_metacall () from /usr/lib/libkdeui.so.5
#19 0x080a08bf in LanguageProperties::qt_metacall (this=0xbf8c8f80, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbf8c7f4c)
    at /build/buildd/kdeedu-4.2.2/obj-i486-linux-gnu/parley/src/languageproperties.moc:68
#20 0xb770fca8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#21 0xb7710932 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#22 0xb7712be3 in QSignalMapper::mapped () from /usr/lib/libQtCore.so.4
#23 0xb771346d in QSignalMapper::map () from /usr/lib/libQtCore.so.4
#24 0xb771365e in QSignalMapper::map () from /usr/lib/libQtCore.so.4
#25 0xb7713f2b in QSignalMapper::qt_metacall () from /usr/lib/libQtCore.so.4
#26 0xb770fca8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#27 0xb77100e0 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#28 0xb68ba6a1 in QAbstractButton::clicked () from /usr/lib/libQtGui.so.4
#29 0xb65e54a9 in ?? () from /usr/lib/libQtGui.so.4
#30 0xb65e7104 in ?? () from /usr/lib/libQtGui.so.4
#31 0xb65e7396 in QAbstractButton::mouseReleaseEvent () from /usr/lib/libQtGui.so.4
#32 0xb625abd3 in QWidget::event () from /usr/lib/libQtGui.so.4
#33 0xb65e534e in QAbstractButton::event () from /usr/lib/libQtGui.so.4
#34 0xb6690310 in QPushButton::event () from /usr/lib/libQtGui.so.4
#35 0xb6203f2c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#36 0xb620cba1 in QApplication::notify () from /usr/lib/libQtGui.so.4
#37 0xb6cc694d in KApplication::notify () from /usr/lib/libkdeui.so.5
#38 0xb76f9a3b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#39 0xb620bc0e in QApplicationPrivate::sendMouseEvent () from /usr/lib/libQtGui.so.4
#40 0xb627ba0e in ?? () from /usr/lib/libQtGui.so.4
#41 0xb627ad37 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#42 0xb62a5cfa in ?? () from /usr/lib/libQtGui.so.4
#43 0xb5925b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#44 0xb59290eb in ?? () from /usr/lib/libglib-2.0.so.0
#45 0xb5929268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#46 0xb7725438 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#47 0xb62a53f5 in ?? () from /usr/lib/libQtGui.so.4
#48 0xb76f806a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#49 0xb76f84aa in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#50 0xb671e7f3 in QDialog::exec () from /usr/lib/libQtGui.so.4
#51 0x08082069 in Editor::slotLanguageProperties (this=0x85ff930) at /build/buildd/kdeedu-4.2.2/parley/src/editor/editor.cpp:557
#52 0x08082703 in Editor::qt_metacall (this=0x85ff930, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0xbf8c90bc) at /build/buildd/kdeedu-4.2.2/obj-i486-linux-gnu/parley/src/editor.moc:80
#53 0xb770fca8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#54 0xb77100e0 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#55 0xb61fd921 in QAction::triggered () from /usr/lib/libQtGui.so.4
#56 0xb61fee9f in QAction::activate () from /usr/lib/libQtGui.so.4
#57 0xb667940c in ?? () from /usr/lib/libQtGui.so.4
#58 0xb667fb5b in ?? () from /usr/lib/libQtGui.so.4
#59 0xb6680632 in QMenu::mouseReleaseEvent () from /usr/lib/libQtGui.so.4
#60 0xb6dad7e5 in KMenu::mouseReleaseEvent () from /usr/lib/libkdeui.so.5
#61 0xb625abd3 in QWidget::event () from /usr/lib/libQtGui.so.4
#62 0xb6682a19 in QMenu::event () from /usr/lib/libQtGui.so.4
#63 0xb6203f2c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#64 0xb620cba1 in QApplication::notify () from /usr/lib/libQtGui.so.4
#65 0xb6cc694d in KApplication::notify () from /usr/lib/libkdeui.so.5
#66 0xb76f9a3b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#67 0xb620bc0e in QApplicationPrivate::sendMouseEvent () from /usr/lib/libQtGui.so.4
#68 0xb627bc96 in ?? () from /usr/lib/libQtGui.so.4
#69 0xb627ad37 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#70 0xb62a5cfa in ?? () from /usr/lib/libQtGui.so.4
#71 0xb5925b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#72 0xb59290eb in ?? () from /usr/lib/libglib-2.0.so.0
#73 0xb5929268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#74 0xb7725438 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#75 0xb62a53f5 in ?? () from /usr/lib/libQtGui.so.4
#76 0xb76f806a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#77 0xb76f84aa in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#78 0xb76fa959 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#79 0xb6203da7 in QApplication::exec () from /usr/lib/libQtGui.so.4
#80 0x0812094b in main (argc=1, argv=0xbf8ca2d4) at /build/buildd/kdeedu-4.2.2/parley/src/main.cpp:139