[sync] error during ActiveSync

[Jens-U. Mozdzen]

Hi,

after weeks of tests on a dedicated server, I've decided to to upgrade  
our Horde4 server to latest H5.

On the new server, syncing my mobile device via ActiveSync doesn't  
work as expected: I created a new "account" on my mobile device  
(dropped the old one that connected to the test server), the initial  
sync works fine and transfers all information as expected. But future  
syncs fail with a PHP error:

==> error_log.ssl <==
[Sat Jan 05 16:12:50 2013] [error] [client 92.231.xxx.xxx] PHP Fatal  
error:  Cannot use object of type Horde_ActiveSync_Folder_Collection  
as array in /usr/share/php5/PEAR/Horde/ActiveSync/State/Base.php on  
line 351

==> access_log.ssl <==
92.231.xxx.xxx - myuser [05/Jan/2013:16:12:45 +0100] "POST  
/Microsoft-Server-ActiveSync?Cmd=FolderSync&User=myuser&DeviceId=xxxxxxxxxxxxxxxxxxxxx&DeviceType=Palm HTTP/1.1" 500  
-

Is the above error obvious enough to developers, or should I create a  
more detailed case description with a sync log, debug trace etc?

Regards,
Jens