plasma-desktop crashed with SIGSEGV in QGraphicsGridLayout::sizeHint()

[clickwir]

Binary package hint: kdebase-workspace

Just upgraded from Jaunty to Karmic via "update-notifier-kde -d". Rebooted just fine, but I have no KDE desktop, background or panel. If I press Alt+F2 I can run a program. Like Firefox now, but when I minimize it, it just goes no where, it's off the screen but I just see blackness and a cursor.

ProblemType: Crash
Architecture: amd64
Date: Thu Oct 22 16:19:44 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/plasma-desktop
Package: kdebase-workspace-bin 4:4.3.2-0ubuntu6
ProcCmdline: /usr/bin/plasma-desktop
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
 LANGUAGE=
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SegvAnalysis:
 Segfault happened at: 0x7f75d4768062: mov %rdx,0x28(%rsp)
 PC (0x7f75d4768062) ok
 source "%rdx" ok
 destination "0x28(%rsp)" (0x7fff36c9d8f8) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: kdebase-workspace
StacktraceTop:
 ?? () from /usr/lib/libQtGui.so.4
 ?? () from /usr/lib/libQtGui.so.4
 ?? () from /usr/lib/libQtGui.so.4
 QGraphicsGridLayout::sizeHint(Qt::SizeHint, QSizeF const&) const () from /usr/lib/libQtGui.so.4
 ?? () from /usr/lib/libQtGui.so.4
Title: plasma-desktop crashed with SIGSEGV in QGraphicsGridLayout::sizeHint()
Uname: Linux 2.6.31-14-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors: (polkit-gnome-authentication-agent-1:1814): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed

[Apport retracing service (apport)]

StacktraceTop:?? () from /usr/lib/libQtGui.so.4
?? () from /usr/lib/libQtGui.so.4
?? () from /usr/lib/libQtGui.so.4
QGraphicsGridLayout::sizeHint ()
?? () from /usr/lib/libQtGui.so.4