akonadi_agent_launcher crashed with SIGSEGV in QApplicationPrivate::set_font()

[mu3en]

on login, crash report as attached. no functions appear affected.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: akonadi-server 1.5.1-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-7.38-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
CrashCounter: 1
Date: Fri Mar 25 23:59:53 2011
ExecutablePath: /usr/bin/akonadi_agent_launcher
InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110301.4)
ProcCmdline: /usr/bin/akonadi_agent_launcher akonadi_akonotes_resource akonadi_akonotes_resource_0
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
 LANGUAGE=
Signal: 11
SourcePackage: akonadi
StacktraceTop:
 ?? () from /usr/lib/libQtGui.so.4
 ?? () from /usr/lib/libQtGui.so.4
 QApplicationPrivate::set_font () from /usr/lib/libQtGui.so.4
 ?? ()
 QApplicationPrivate::wheel_scroll_lines () from /usr/lib/libQtGui.so.4
Title: akonadi_agent_launcher crashed with SIGSEGV in QApplicationPrivate::set_font()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 ~QMap (this=0x22552b0, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qmap.h:187
 QFontCache::~QFontCache (this=0x22552b0, __in_chrg=<value optimized out>) at text/qfont.cpp:2642
 qt_guiPlatformPlugin()::plugin () from /usr/lib/libQtGui.so.4
 QApplicationPrivate::set_font () from /usr/lib/libQtGui.so.4
 ?? ()