Version:            (using KDE KDE 3.1.94)
Installed from:    Compiled From Sources
Compiler:          gcc-3.3.1 
OS:          Linux

I've seen this crash while closing JuK.

(no debugging symbols found)...[New Thread 16384 (LWP 22824)]
0x41aa41b7 in waitpid ()
   from /lib/libpthread.so.0
#0  0x41aa41b7 in waitpid () from /lib/libpthread.so.0
#1  0x40ed9bea in KCrash::defaultCrashHandler(int) ()
   from /usr/local/kde/lib/libkdecore.so.4
#2  0x41aa28e5 in __pthread_sighandler () from /lib/libpthread.so.0
#3  <signal handler called>
#4  0x0806fbf7 in PlaylistItem::slotClear() ()
#5  0x08071378 in PlaylistItem::qt_invoke(int, QUObject*) ()
#6  0x412cb76c in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /usr/qt/lib/libqt-mt.so.3
#7  0x412cb5a4 in QObject::activate_signal(int) ()
   from /usr/qt/lib/libqt-mt.so.3
#8  0x08071300 in PlaylistItem::signalAboutToDelete() ()
#9  0x0806f0c1 in PlaylistItem::~PlaylistItem() ()
#10 0x0806e198 in CollectionListItem::~CollectionListItem() ()
#11 0x413a2cb6 in QListViewItem::~QListViewItem() ()
   from /usr/qt/lib/libqt-mt.so.3
#12 0x413b73cd in QListViewPrivate::Root::~Root() ()
   from /usr/qt/lib/libqt-mt.so.3
#13 0x413a69be in QListView::~QListView() () from /usr/qt/lib/libqt-mt.so.3
#14 0x40c2a8a2 in KListView::~KListView() ()
   from /usr/local/kde/lib/libkdeui.so.4
#15 0x08073442 in Playlist::~Playlist() ()
#16 0x0806d550 in CollectionList::~CollectionList() ()
#17 0x412fb14b in QWidget::~QWidget() () from /usr/qt/lib/libqt-mt.so.3
#18 0x41405996 in QWidgetStack::~QWidgetStack() ()
   from /usr/qt/lib/libqt-mt.so.3
#19 0x412fb5d3 in QWidget::~QWidget() () from /usr/qt/lib/libqt-mt.so.3
#20 0x412fb14b in QWidget::~QWidget() () from /usr/qt/lib/libqt-mt.so.3
#21 0x413e5501 in QSplitter::~QSplitter() () from /usr/qt/lib/libqt-mt.so.3
#22 0x412fb14b in QWidget::~QWidget() () from /usr/qt/lib/libqt-mt.so.3
#23 0x413e53c1 in QSplitter::~QSplitter() () from /usr/qt/lib/libqt-mt.so.3
#24 0x0807ce2f in PlaylistSplitter::~PlaylistSplitter() ()
#25 0x0809581c in JuK::queryExit() ()
#26 0x40c5b8d9 in KMainWindow::shuttingDown() ()
   from /usr/local/kde/lib/libkdeui.so.4
#27 0x40c5c2ca in KMainWindow::qt_invoke(int, QUObject*) ()
   from /usr/local/kde/lib/libkdeui.so.4
#28 0x08096ef5 in JuK::qt_invoke(int, QUObject*) ()
#29 0x412cb76c in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /usr/qt/lib/libqt-mt.so.3
#30 0x412cb5a4 in QObject::activate_signal(int) ()
   from /usr/qt/lib/libqt-mt.so.3
#31 0x40e5379e in KApplication::shutDown() ()
   from /usr/local/kde/lib/libkdecore.so.4
#32 0x40e53a15 in KApplication::qt_emit(int, QUObject*) ()
   from /usr/local/kde/lib/libkdecore.so.4
#33 0x40ef9dad in KUniqueApplication::qt_emit(int, QUObject*) ()
   from /usr/local/kde/lib/libkdecore.so.4
#34 0x412cb71b in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /usr/qt/lib/libqt-mt.so.3
#35 0x412cb5a4 in QObject::activate_signal(int) ()
   from /usr/qt/lib/libqt-mt.so.3
#36 0x415e53fc in QApplication::aboutToQuit() () from /usr/qt/lib/libqt-mt.so.3
#37 0x412834e7 in QEventLoop::enterLoop() () from /usr/qt/lib/libqt-mt.so.3
#38 0x412833c8 in QEventLoop::exec() () from /usr/qt/lib/libqt-mt.so.3
#39 0x4126fea1 in QApplication::exec() () from /usr/qt/lib/libqt-mt.so.3
#40 0x08097a42 in main ()
#41 0x41c3c91e in __libc_start_main () from /lib/libc.so.6