Update of event leads to doubled event

[Saim Kim]

Hello,

new year new problems ;-)

One of my users has a problem with events that are doubled when updated 
-but only sporadically. Here is how it happens:

User A creates a new event with User B
User B automatically accepts the event
The event is entered into User B's calendar
User A shifts the event to a later time (overlap/no overlap doesn't make 
a difference)
User B has two events: the original one and a new one with the updated 
time + "updated:" in the event name

I checked the kolab-filter.log  and found several php error messages like:
Jan 05 11:31:40 Kolab Filter [error] [horde] PHP Error: Undefined 
index:  CN <ID: <alphanumericnumbers at computername>> [pid 10248 on line 
861 of "/ko
lab/lib/php/Kolab/Filter/Resource.php"]

Jan 05 11:31:51 Kolab Filter [error] [horde] PHP Error: Undefined 
index:  X-UID <ID: <alphanumericnumbers at computername>> [pid 9967 on line 
1342 of "
/kolab/lib/php/Kolab/Filter/Resource.php"]

Jan 05 11:31:51 Kolab Filter [error] [horde] PHP Error: Undefined 
index:  X-SID <ID: <alphanumericnumbers at computername>> [pid 9967 on line 
1342 of "
/kolab/lib/php/Kolab/Filter/Resource.php"]


Has anyone a hint on why the existing event is not detected?

Best regards,
Saim

-- 
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Dipl.-Ing. Saim Kim
Lehrstuhl fuer Medizinische Informationstechnik
Helmholtz-Institut fuer Biomedizinische Technik
RWTH Aachen
Pauwelsstr. 20, D-52074 Aachen
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Web:   http://www.medit.hia.rwth-aachen.de/
Tel:   +49-(0)241-80 23218
Fax:   +49-(0)241-80 82442
email: s.kim at hia.rwth-aachen.de
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