No title bars, cannot click menu items, settings -> window manager does not open

[taj]

This seems to be a long-standing bug, see: http://ubuntuforums.org/showthread.php?t=1765417

Description:
No title bars+buttons. I could move windows around, but could not click anything in the menus: the list showed, but disappeared as soon as the cursor was moved into the menu. I tried going into settings --> window manager tweaks, but just got a blank panel.

Workaround is available:
1) clear cache: rm -r ~/.cache/sessions
2) With Alt-F2, run: xfwm4 --replace

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xfwm4 4.8.3-1ubuntu1.1
ProcVersionSignature: Ubuntu 3.2.0-31.50-generic 3.2.28
Uname: Linux 3.2.0-31-generic i686
ApportVersion: 2.0.1-0ubuntu13
Architecture: i386
Date: Mon Sep 24 12:33:04 2012
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xfwm4
UpgradeStatus: Upgraded to precise on 2012-08-27 (27 days ago)