[Evolution] Unable to retrieve message

[Hoffmann Geerd-Dietger <didi ribalba de>]

Hi

I have just swapped all my email accounts to IMAP and now about every
10th message returns.

Unable to retrieve message
Could not find message body in FETCH response.

I looked into the imap folder and can't really find anything suspicious
in the files.

And it happens with 3 different mail accounts.

I am using 
Evolution 2.6.2

Any ideas?

Cheers

Didi