evolution, Natty: no such table and unable to display email

Binary package hint: evolution

Few days ago (last Saturday) I switched from ubuntu 10.04 to 11.04 on a workstation. I made new clean install on the system partition mounted on / but I kept the partition with the /home folder untouched. BTW, I noticed that evolution in 11.04 uses a different location to store email, namely /home/konopka/.local/share/evolution/mail/local/

I am using IMAP.
My settings on the actual system have been such that sent emails are copied to a folder on local machine, namely to
Sent/2011 (as seen in Defaults settings of evolution).
Today I tried to view (in evolution) messages copied into this folder. I obtained the following error message:
"Error while Generating message list.
no such table:mem.Sent/2011"

What is even worse I can not see content of one of the emails stored in the folder (more precisely, it is a file). It is an email I sent last Thursday (that time it was ubuntu 10.04 on the machine). It had also an attachment (a not too big PDF document).

If I view the folder (it is actually a file, not directory) with messages (using vim), namely the file
/home/konopka/.local/share/evolution/mail/local/Sent.sbd/2011
I actually can see the body of the email and also its attachment .
Then I do not understand why evolution can not display this email. It has nothing special in it. Other email around it are all displayed correctly.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: evolution 2.32.2-0ubuntu7
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Tue May 3 10:32:17 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
 LANGUAGE=en
 PATH=(custom, user)
 LANG=en_GB.utf8
 LC_MESSAGES=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution
UpgradeStatus: No upgrade log present (probably fresh install)