transferred dbmail from pgsql 32bit to 64bit, and converted SQL-ASCII to UTF8, now strange

Hi, after the last recommendation to use UTF8 instead of
SQL-ASCII, I 
finally made the transfer last night. It was a hard issue,
as the only 
utility I know is "iconv", but it has the problem
that it needs to have 
the whole file in memory. So I split my backup into each
table, and ran 
iconv (dbmail_messageblks still had 6 GB so you need 6GB
free RAM 
during the conversion), then reimported everything on a
64bit SUSE10.2 
instead 32bit SUSE10.2, for the increased memory footprint
needed by 
the DB.

I did NOT import all those cache tables like dbmail_tofield
etc., but 
instead I ran "dbmail-util" afterwards, which
recreated those caches. 
Well, at least most, but now everytime I run it, it lets 15

physmessages untouched:

Repairing DBMAIL for cached header values...
Ok. Found [15] un-cached physmessages.
...............

The output look good, but the log says:
dbmail/maintenance[10985]: Error:[sql]
dbpgsql.c,db_query(+284): query 
failed [INSERT INTO dbmail_headervalue (headername_id,
physmessage_id, 
headervalue) VALUES (9,642245,'Germanwings
Buchungsbestätigung und 
Rechn?ßUTF-8?Q?ung L6D2QM')] : [FEHLER:  ungültige
Byte-Sequenz für 
Kodierung »UTF8«: 0xdf55 HINT:  Dieser Fehler kann
auch auftreten, 
wenn die Bytesequenz nicht mit der Kodierung
übereinstimmt, die der 
Server erwartet, welche durch »client_encoding«
bestimmt wird. ]
(see full log at http://zmi.at/x/dbmai
l-utf8.txt )

It looks to me as if there's an UTF8 encoding issue, but how
can that 
be? The DB is created as UTF8, I imported the db fresh after
conversion 
with iconv (using iconv -f iso-8859-1 -t utf-8), which did
not give me 
any errors,

I have encoding = utf8 in dbmail.conf also. What should I do
now?

mfg zmi
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