[horde] ActiveSync Problem with HTC Device

[lst_hoe02 at kwsoft.de]

Hello,

we try to use ActiveSync (latest pear updates) with a HTC touch  
device. After device setup the following error is shown in the horde  
logfile:

Sep  3 16:43:29 HORDE: [horde] SQL QUERY FAILED: SQLSTATE[42883]:  
Undefined function: 7 ERROR:  operator does not exist: character  
varying = integer
LINE 1: ... = 'HTCC19C292891BEA121A5D3B337E47B9' AND sync_folderid = -1
                                                                    ^
HINT:  No operator matches the given name and argument type(s). You  
might need to add explicit type casts.
	SELECT sync_key FROM horde_activesync_state WHERE sync_devid =
	  'HTCC19C292891BEA121A5D3B337E47B9' AND sync_folderid = -1 [pid  
24372 on line 553 of "/usr/share/php/Horde/Db/Adapter/Base.php"]

Any idea where the "-1" come from? I guess this shouldn't happen, no?

Regards

Andreas