Horde is very slow when calendar is filled with a lot of entries

[B. Buehler]

Hi

i'm testing kolab 2.2.rc1 on openSuSE 10.3. 

If there are only a few entries the performance works well. If the calendar is 
filled with about thousand entries, a long time is needed to login. 

It takes several minutes to display the calendar, too. 

The KDE Contact displays the same calendar much more quickly.

I tried to make an index on the mailbox with squatter, but it didn't solve the 
problem. 

That's what I found in the php-errors.log:

[12-Mär-2008 16:43:27] PHP Notice:  Undefined index:  default 
in /usr2/kolab/var/kolab/www/horde/turba/lib/Driver/kolab.php on line 175
[12-Mar-2008 16:46:16] PHP Notice:  Unknown: SECURITY PROBLEM: insecure server 
advertised AUTH=PLAIN (errflg=1) in Unknown on line 0
[12-Mar-2008 16:46:17] PHP Notice:  Unknown: SECURITY PROBLEM: insecure server 
advertised AUTH=PLAIN (errflg=1) in Unknown on line 0
[12-Mär-2008 16:49:45] PHP Notice:  Undefined index:  default 
in /usr2/kolab/var/kolab/www/horde/turba/lib/Driver/kolab.php on line 175

What can I do?

Thank you very much

Bernhard