amarok crashed with SIGSEGV in QIODevice::readAll()

Binary package hint: amarok

after trying to have sound in both amarok and skype i toggled between "Pulseaudio" and "PNP Audio Device" in System Settings which caused the crash of amarok, among other crashes.

my system:
Kubuntu Karmic Beta
amd64 X2 5600++
integrated sound card
2 GB ram
nvidia 8500gt

ProblemType: Crash
Architecture: i386
CrashCounter: 1
Date: Fri Oct 9 22:57:32 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/amarok
NonfreeKernelModules: nvidia
Package: amarok 2:2.2.0-0ubuntu2
ProcCmdline: /usr/bin/amarok
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-13.42-generic
SegvAnalysis:
 Segfault happened at: 0x638bc17 <_ZN9QIODevice7readAllEv+71>: call *0x50(%eax)
 PC (0x0638bc17) ok
 source "*0x50(%eax)" ok
 Reason could not be automatically determined.
Signal: 11
SourcePackage: amarok
StacktraceTop:
 QIODevice::readAll() () from /usr/lib/libQtCore.so.4
 lastfm::ws::parse(QNetworkReply*) ()
 lastfm::Artist::getSimilar(QNetworkReply*) ()
 ?? () from /usr/lib/kde4/amarok_service_lastfm.so
 ?? () from /usr/lib/kde4/amarok_service_lastfm.so
Title: amarok crashed with SIGSEGV in QIODevice::readAll()
Uname: Linux 2.6.31-13-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev root sambashare
XsessionErrors: (polkit-gnome-authentication-agent-1:2451): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed