Getting Constant Error Message

Hi all, 

for about two weeks I keeping getting the following error message about every 
10-15 minutes after I had searched for a specific mail (But hadn't been 
successful):

Fehler bei der Suche.
Durchsuchen von Ordner INBOX ist fehlgeschlagen. Die Serverantwort lautet: 
[CLIENTBUG] UID SEARCH error - Syntax of the search criteria is invalid

"Error when searching.
Search in folder INBOX failed. The server response is: [CLIENTBUG] UID SEARCH 
error - Syntax of the search criteria is invalid"


Kmail gives me two options, either CANCEL or CONTINUE
No matter what I select, the message keeps popping up regularly.

And Kmail started to crash quite often, even when doing other things and no 
error message was displayed. :-(((

I looked for an answer on Google, but the two results I got, did not help me. 
When doing the search, I did not set up a specific folder for the search results.

Does anyone know how to get rid of this annoying message? 

KDE 4.8.4
Kmail Version 1.13.7


-- 
______________________________________________________________
Pascal Bernhard
Schwalbacher Straße 7
12161 Berlin
Germany


Je me regarde pour me désoler, 
je me compare pour me consoler.
(Maurice de Talleyrand)

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