[Koha] Modifying Z39.50 Servers from Parameters web interface

Hi, while I can enter new Z39.50 Servers using the intranet web interface (Parameters - Z39.50 Servers), I cannot edit or delete them with Koha-2.2RC5. E.g., clicking on the "Modify Z39.50 Server" for any of them produces an empty form, much like the one one has to fill to enter a new Z39.50 Server, but with all entries emptied. I can of course modify the appropriate mysql table manually, by entering mysql. I guess it's a problem with the php interface. Regards, Giuseppe. P.S. Please, forward this message to a more appropriate mailing list, if required.