Evolution looses emails when moving mails

[1448412]

I was moving mails in a rather large structure on a gmail account, accesses using imap+. I was moving a subfolder.

I got a warning that the source could not be read. After that, the source-folder disappeared and never showed up in the destination folder. I tried with 4 other folders that all got lost.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: evolution 3.2.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Thu Dec 29 17:42:43 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution
UpgradeStatus: Upgraded to oneiric on 2011-10-19 (71 days ago)

[1448412 (uli-rgbg)]

I also noted problems when moving mails to local folders. When moving a folder from the gmail account to a local folder I get the message: "Fehler bei »Nachrichten werden in den Ordner technik/archiv/2010 verschoben«.
Nachricht kann nicht in den Zielordner übertragen werden: Datei oder Verzeichnis nicht gefunden"
(Error occurred at: "Messages are moved to the folder <....>"
Message cannot be moved to destination folder: File or directory not found.)

[1448412 (uli-rgbg)]

I also noted problems when moving sub-folders where source and destination both were in the same local mail directory. I recorded the failure with recordmydesktop and could provide the screencast if that is of any use to you.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[1448412 (uli-rgbg)]

Evolution has also problems copying mails.
*) When I copy mails I often get the "file or directory not found" message and the mails are not copied. CTRL+E on source and destination folder and after that copying again usually is successful.
*) When I copy folders containing mails and subfolders in one local account from one location to another very often the folder-structure gets copied to the destination but in many subfolders (not all) the mails were not copied. It seems that for a subfolder eigher all mails are copied or none at all. There is no error reported. When I open all the folders in the source structure and copy after that, it seems that copying is more likely to succeed.

Could it be a caching-problem?

I suspect also that poor error handling might be part of the problem.

Could you please make sure that evolution under no circumstances silently ignores errors? If evolution can't find out what actually is causing the problem, it's still better to get a cryptic error message than not to notice at all that something has gone wrong...

Surely moving means copying and deleting afterwards. If this is true, could you please also make sure that no deleting can takes place when copying has somehow failed?