Cannot access Alternate Name field?

What happened to the Alternate Name: field in person documents?

I cant edit the field any more, all other fields are editable.

Any suggestions?

Subject: Cannot access Alternate Name field?

I have not find any solution to this yet.

I tried to open backupped, local adressbooks as well but I cannot edit the Alternate Name field in those either?

I even tried to rebuild the indexes, did not help …

I cannot understand what has happened, this has not been a problem before and we havent upgraded anything…