kdeinit4 crashed with signal 7 in KPixmapCache::Private::mmapFile()

["Kosmonaut" Bernd Müller]

Kubuntu Lucid 10.04 Alpha2.
I am afraid to say that I have got no idea what I could have done to produce this issue. Maybe this report is useful anyhow....

ProblemType: Crash
Architecture: i386
Date: Wed Feb 24 10:29:17 2010
DistroRelease: Ubuntu 10.04
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/kdeinit4
InstallationMedia: Kubuntu 10.04 "Lucid Lynx" - Alpha i386 (20100112.3)
Package: kdelibs-bin 4:4.4.0-0ubuntu3
ProcCmdline: kdeinit4:\ plasma-desktop\ [kdeinit]
ProcEnviron:
 LANG=C
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-14.20-generic
Signal: 7
SourcePackage: kde4libs
StacktraceTop:
 KPixmapCache::Private::mmapFile(QString const&, KPixmapCache::Private::MmapInfo*, int) () from /usr/lib/libkdeui.so.5
 KPixmapCache::Private::mmapFiles() ()
 KPixmapCache::Private::init() () from /usr/lib/libkdeui.so.5
 KPixmapCache::discard() () from /usr/lib/libkdeui.so.5
 KPixmapCache::deleteCache(QString const&) ()
Title: kdeinit4 crashed with signal 7 in KPixmapCache::Private::mmapFile()
Uname: Linux 2.6.32-14-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors: (process:1222): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed

[Apport retracing service (apport)]

StacktraceTop:
 KPixmapCache::Private::mmapFile (this=0x90ab2f8,
 KPixmapCache::Private::mmapFiles (this=0x90ab2f8)
 KPixmapCache::Private::init (this=0x90ab2f8)
 KPixmapCache::discard (this=0x9151ed0)
 KPixmapCache::deleteCache (name=@0xbfe629dc)