Duplication of appointments in shared calendar

[Albrecht Dreß]

Hi,

I have a *really* nasty problem with the duplication of appointments in  
a shared calendar.  I run a self-compiled Kolab 2.2.0 on Ubuntu  
8.04/64.  My users (~35) use Outlook 2002/2003/2007 through the latest  
Toltec connector.

The problem occurs on a shared calendar for which all users have write  
access.  Periodically, *all* appointments in this calendar get  
mysteriously duplicated, and in some cases they occur even more times  
(I saw up to 8 copies of the same one).  Sometimes the attributes of  
the copies are slightly different (e.g. the background colour displayed  
in Outlook is changed).

I tried to follow (in imapd.log) who adds the "spam" to the calendar,  
and temporarily de-activated write access for those users, but  
apparently many of them seem to trigger this problem.

Is this a known problem?  In Toltec or in Kolab?  Any idea how I can  
solve this bug?  It is somewhat annoying to manually erase the  
duplicates manually every day...

Thanks,
Albrecht.