The Roundcube webmail client address book is currently broken. The logs are reporting “DB Error: MDB2 Error: unknown error”. Only the address book function is affected. We are investigating this issue, but we do not have an estimated resolution time.
[RESOLVED] Roundcube had an extra bind variable in SQL queries related to the address book. The SQL statement that contained the bind was dynamically defined, but the variable itself was always passed, leading to an extra bind variable when the SQL statement didn’t contain the bind. We have removed the offending lines from our Roundcube source. (For the programmers in the audience, here’s our diff: rcube_contacts.patch)