The Evolution data has been lost and/or corrupted after upgrading from 11.04 to 11.10

[John]

Some of the mail folders have been 'lost' while the names of others have been corrupted.
The system is unacceptably slow after upgrading.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: evolution 3.2.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu3
Architecture: i386
Date: Thu Oct 20 12:51:06 2011
ExecutablePath: /usr/bin/evolution
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution
UpgradeStatus: Upgraded to oneiric on 2011-10-20 (0 days ago)
XsessionErrors:
 (nautilus:1623): Gtk-CRITICAL **: gtk_action_set_visible: assertion `GTK_IS_ACTION (action)' failed
 (nautilus:1623): Gtk-CRITICAL **: gtk_action_set_visible: assertion `GTK_IS_ACTION (action)' failed
 (evolution:2275): Gtk-WARNING **: Theme parsing error: <data>:3:58: Expected a string.
 (evolution:2275): Gtk-WARNING **: Theme parsing error: <data>:3:58: Expected a string.