Version:           unknown (using 4.4.1 (KDE 4.4.1), Arch Linux)
Compiler:          gcc
OS:                Linux (x86_64) release 2.6.32-ARCH

From what was generated by Crash Handler:
Application: ksmserver (0.4)
KDE Platform Version: 4.4.1 (KDE 4.4.1)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-ARCH x86_64

-- Information about the crash:
Crashed when I was logging out.

 -- Backtrace:
Application: KDE Session Manager (kdeinit4), signal: Bus error
[KCrash Handler]
#5  0x00007f127e59b6c0 in KPixmapCache::Private::mmapFile(QString const&, KPixmapCache::Private::MmapInfo*, int) () from /usr/lib/libkdeui.so.5
#6  0x00007f127e59cf64 in KPixmapCache::Private::mmapFiles() () from /usr/lib/libkdeui.so.5
#7  0x00007f127e59cd83 in KPixmapCache::Private::init() () from /usr/lib/libkdeui.so.5
#8  0x00007f127e59e7ed in KPixmapCache::discard() () from /usr/lib/libkdeui.so.5
#9  0x00007f127e59eed8 in KPixmapCache::deleteCache(QString const&) () from /usr/lib/libkdeui.so.5
#10 0x00007f127575afad in Plasma::ThemePrivate::discardCache() () from /usr/lib/libplasma.so.3
#11 0x00007f127575b40d in Plasma::ThemePrivate::compositingChanged() () from /usr/lib/libplasma.so.3
#12 0x00007f1275760f62 in Plasma::Theme::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libplasma.so.3
#13 0x00007f127dffd4df in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#14 0x00007f127e5954cd in KSelectionWatcher::Private::x11Event(_XEvent*) () from /usr/lib/libkdeui.so.5
#15 0x00007f127e51c206 in KApplication::x11EventFilter(_XEvent*) () from /usr/lib/libkdeui.so.5
#16 0x00007f127d207741 in ?? () from /usr/lib/libQtGui.so.4
#17 0x00007f127d216221 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#18 0x00007f127d241172 in ?? () from /usr/lib/libQtGui.so.4
#19 0x00007f127945926e in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#20 0x00007f127945cc28 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#21 0x00007f127945cd50 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#22 0x00007f127e013c13 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#23 0x00007f127d240d6e in ?? () from /usr/lib/libQtGui.so.4
#24 0x00007f127dfe90c2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#25 0x00007f127dfe949c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#26 0x00007f127dfed1db in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#27 0x00007f127072f377 in kdemain () from /usr/lib/libkdeinit4_ksmserver.so
#28 0x0000000000406b7e in _start ()